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Associated Press
Notable actors, celebrities who appeared in an episode of 'The Office'
NBC's hit 'The Office' celebrates its 15th anniversary later this year.
Over the course of 9 seasons, numerous actors and other celebrities made an appearance or two on the show.
Today we take a look at 30 guest appearances on 'The Office' that you might not remember.
-Mike Rose, cleveland.com
This is the first in a series of special slideshows running this year related to the anniversary of 'The Office'
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Associated Press
Will Ferrell as Deangelo Vickers
Will appeared in four episodes of Season 7 as Michael's replacement as regional manager before he fell victim to a falling basketball hoop.
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Associated Press
Amy Adams as Katy
Appearing in the final episode of Season 1 and two episodes of Season 2 as potential competition with Pam for Jim's heart.
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Associated Press
Roseanne Barr as Carla Fern
Appeared in two Season 9 episodes as Andy's new talent agent
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Associated Press
Joan Cusack as Erin's biological mother
Introduced herself in the show's finale as Erin's biological mother who had given her up due to hers and her husband's work as puppeteers on 'The Dark Crystal'
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Associated Press
Ed Begley Jr. as Erin's biological father
Also appeared in the finale with his wife.
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Associated Press
Conan O'Brien as himself
Appeared in the Season 2 episode 'Valentine's Day,' walking past Michael who was busy stopping a woman he thought was Tina Fey, but was captured by the camera crew.
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Associated Press
Ricky Gervais as David Brent
Twice reprised his lead-role from the British version of 'The Office,' once bumping into Michael in the hallway and also via a video where he applied to be the new regional manager
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Associated Press
Dakota Johnson as Dakota
Appeared in the final episode as one of the new hires Dwight made as regional manager
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Associated Press
Warren Buffett as an interviewee
Interviewed for the role of regional manager
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Associated Press
Bob Odenkirk as Mark
Appeared in Season 9 as the manager of a real estate office in Philadelphia where Pam was interviewing for a job.
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Associated Press
Michael Imperioli as Sensei Billy
Dwight's new sensei who finally bestowed upon him a black belt, the 'Sopranos' star appeared in Season 9
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Associated Press
Melissa Rauch as Cathy
Rauch played a new mom in Season 6 who shared a hospital room with Pam
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Associated Press
Kevin McHale as a delivery boy
Kevin showed up in Season 4 as the pizza delivery boy that Michael temporarily kidnapped.
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Associated Press
Maura Tierney as Mrs. California
Played Robert California's wife who was looking for a job in the Scranton branch in a Season 8 episode
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Associated Press
Ryan Howard as himself
The former Phillies slugger showed up in Season 9 as a potential client Jim and Daryl were trying to lure to their company
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Associated Press
David Mazouz as Bert California
The 'Gotham' star showed up in the Halloween episode of Season 8
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Associated Press
Will Arnett as Fred Henry
Will appeared in Season 7 as an interviewee who was very tight-lipped about his plan to turn around the company.
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Associated Press
Jim Carrey as an interviewee
Carey was the final applicant for the Regional Manager who was revealed at the end of Season 7. He was the one who insisted on having time off to go to the Finger Lakes.
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Associated Press
Julius Erving as Dr. J
Jim's sports idol showed up in Season 9 as an Athlead client.
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Associated Press
Jerome Bettis as 'The Bus'
Bettis appeared as himself signing autographs and turning down an invitation to Michael's hotel party.
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Associated Press
Tim Meadows as Christian
Meadows' character met with Jan and Michael at Chili's to discuss the paper needs for Lackawanna County.
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Associated Press
Ray Romano as Merv Bronte
Ray showed up in Season 7 as an applicant to replace Michael as regional manager who found his efforts sabotaged by Robert California.
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Associated Press
Clay Aiken as himself
Appeared as a judge for the show 'America's Next A Capella Sensation' who was not impressed by Andy's performance.
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Associated Press
Josh Groban as Walter Bernard Jr.
Appeared in an episode in both Season 8 and Season 9 as Andy's younger brother
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Associated Press
Ken Jeong as Bill
A fellow classmate in Michael's improv class in Season 2
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Associated Press
Anna Camp as Penny Beesly
Appeared as Pam's younger sister in the two Niagara Falls episodes in Season 6
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Associated Press
Georgia Engel as Irene
Engel appeared in three episodes of Season 8 as the retiree who hired Erin in Florida.
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Associated Press
Timothy Olyphant as Danny Cordray
The 'Deadwood' star appeared in two Season 7 episodes as a new salesman who once dated Pam and never called her back
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Associated Press
Yvette Nicole Brown as Paris
Played a co-worker of Dwight while he worked at Staples
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Mike Starr as Angelo Grotti
Starr appeared as a life insurance agent who Michael thought was in the mafia and was trying to shake him down.
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Bonus: Jessica Alba as Sophie, Jack Black as Sam and Cloris Leachman as Mrs. Hanaday
While none of the trio actually appeared in the show, they did appear in the movie Andy illegally downloaded and watched during the episode, 'Mrs. Albert Hanaday'
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Associated Press
Bonus 2: Christian Slater as himself
Another example of a guest-star who wasn't actually on the set, Slater appeared in the Sabre welcome video that played in the Scranton office in Season 6.
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Associated Press
Bonus 3: Stephen Colbert as Broccoli Rob
The oft-mentioned fellow member of Here Comes Treble was introduced via video chat in Season 9
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Associated Press
Bonus 4: Bill Hader as himself
Hader appeared as himself in the finale, appearing on screen in a fake 'SNL' skit as the character Baby Wawa
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Associated Press
2019: In memoriam
Take a look back at celebrities and other famous individuals who died in 2019.
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Associated Press
Celebrity fun facts
Danielle Fishel and the 'Boy Meets World' cast
Jennifer Lawrence & Mila Kunis
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Associated Press
Movie and television fun facts
'Friends' turns 25: Fun facts about the hit show
25 celebrities who appeared on 'Friends'
15 fun facts about 'Napoleon Dynamite' to celebrate its 15th anniversary
20 fun facts about 'The Phantom Menace' for its 20th anniversary
25 actors you didn't know were on 'Game of Thrones'
In Memoriam: Celebrities we lost in 2018
20 fun facts about 'Love Actually'
Relive your childhood with these 120 Hanna-Barbera cartoons
25 actors you didn't know appeared in 'Boy Meets World'
88 celebrities who were born in Canada
Fun facts about 'The Big Lebowski' and 20 other movies turning 20 in 2018
Fun facts about 'I Know What You Did Last Summer' for its 20th anniversary
Celebrate 'Dirty Dancing' turning 30 with these fun facts
20 fun facts about 'Scream' for its 20th anniversary
'Romeo + Juliet' turns 20: Where are they now
Remembering Alan Rickman: His most memorable roles
10 movies that turned 10 in 2016
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