• 'Back to School' (1986)

as Professor Terguson

Gets his own scene as the jingoistic history professor of Rodney Dangerfield's character. Later reappears in the background of the oral exam in the penultimate final scene of the film.

• 'The People vs. Larry Flynt' (1996)

as Network Reporter

Plays a reporter for CBS who arrives at Woody Harrelson's character's house for an exclusive scoop.

• 'An American Werewolf in London' (1981)

as 2nd Chess Player

Recurring background role as the shifty chess partner of Brian Glover's character at The Slaughtered Lamb. Gets multiple close-ups including spitting out lager in laughter and reappears as a member of the firing squad who kills the first werewolf.

• 'Joker' (2019)

as Gene Ufland

Plays the concerned producer on Robert De Niro's character's talk show, who voices disapproval over Joaquin Phoenix's character's guest appearance right before the climax of the film.

• 'Almost Famous' (2000)

as Eagles Road Manager

Non-speaking background role as Raymond (name not given in credit), the manager of The Eagles. He presides over a poker game with other bands' management which Patrick Fugit's character attends.

• 'Hot Fuzz' (2007)

as Sergeant Turner

Plays the desk sergeant(s) of the Sanford Police, being one of the first to meet Simon Pegg's character following his bust of several underage drinkers at the local pub. Also plays a more uncooperative version, revealed to be the first's twin brother in a gag prior to the climactic showdown in the town square.

• 'The Cable Guy' (1996)

as Medieval Times Host

Host of Medieval Times and announcer of the upcoming battle between Jim Carrey's character and Matthew Broderick's character.

• 'The Princess Bride' (1987)

as The Impressive Clergyman

Gets a memorable scene as the wedding minister between Chris Sarandon's character and Robin Wright's character. Has a strong speech impediment that is played for amusing effect when reading the vows.

• 'Love Actually' (2003)

as Rufus

Recurring enigmatic character who appears in two scenes, yet gets poster billing. His excessive packaging of Alan Rickman's character's gift for his affair causes him to run out of time and abandon it. He later appears prior to the climactic chase sequence of Thomas Brodie-Sangster's character, seemingly accidentally allowing him entry past airport security, but gives a knowing look to Liam Neeson's character suggesting it was an intentional distraction.

• '30 Rock: Tracey Does Conan/Last Lunch' (2006/2013)

as Conan O'Brien

Guest appearance as host of his former real-life Late Night with Conan O'Brien which Tracy Morgan's character guest stars on. Reappears for a quick gag as the ex-boyfriend of Tina Fey's character.

• 'Fantasia 2000' (1999)

as Hosts of 'The Sorcerer's Apprentice' segment

As themselves, they introduce the aforementioned segment with Penn delivering the dialogue (as per usual) and Teller performing various tricks behind him.

• 'Jacob's Ladder' (1990)

as Geary

Plays a lawyer initially persuaded to take the case of Tim Robbins's character's Vietnam War allegations, only to drop him and the case after discovering military files alleging his discharge on the grounds of psychological incompatibility.

• 'Starship Titanic' (1998)

as The Bomb (Credited as Kim Bread)

Plays the eccentrically neurotic voice of the bomb onboard the Starship Titanic that may be optionally triggered by the player.

• 'History of the World, Part I' (1981)

as Monsieur Rimbaud

Plays the senile father of Pamela Stephenson's character during the French Revolution, who she seeks to release from jail with the assistance of Mel Brooks's character.

• 'Dumb and Dumber' (1994)

as Anxious Man at Phone

Serves as the comic foil to Mike Starr's character when, after repeatedly interrupting his phone call to his boss, he gets knocked-out through the payphone.

• 'WALL-E' (2008)

as Shelby Forthright

Plays the past CEO of Buy-N-Large and the only live-action character in the film (and the first in a Pixar film) through prerecorded messages.

• 'Red Dwarf: Confidence and Paranoia' (1988)

as Confidence

Guest appearance as the physical manifestation of Craig Charles's character's perception of confidence, a greased-up New York game show host.

• 'Grand Theft Auto V' (2013)

as Chef

Small role as the meth-dealing ally of Steven Ogg's character, who assists the player in gunfights and is an optional crewman of heists later in the game.

• 'Grand Theft Auto IV' (2008)

as Irish Gangster (Credited as Gregg 'Opie' Hughes)

Miscellaneous role as Irish gangmembers, presumably those of the McReary Crime Family.

• 'Pee-wee's Big Adventure' (1985)

as Reporter

Brief cameo at the end of the film as a reporter on the scene following Paul Reubens's character's heroism at a burning pet shop. Behind the scenes, Hartman helped co-create the character of Pee-wee Herman and co-wrote the movie.

• 'Doctor Who: The Sontaran Stratagem/The Poison Sky' (2008)

as General Staal

Guest appearance as the main villain of the two-parter, playing the commanding officer of the Sontarans and their invasion of Earth, facing against David Tennant's character as the 10th Doctor.

• 'Only Fools and Horses: If They Could See Us Now...!' (2001)

as Jonathan Ross

Guest appearance as host of Goldrush, a game show David Jason's character is a contestant on.

• 'Brazil' (1985)

as Charlie - Dept. of Works

Cameo role at the beginning of the film as one of two state repairmen attempting, and failing, to fix the hole in the floor of Kim Greist's apartment.

• 'Malcolm in the Middle: Clip Show' (2002)

as Dr. Kennedy

Plays the psychiatrist of the three main boys of Bryan Cranston's character, whose session with them plays into the clip show theme of the episode.

• 'South Park: Cartman's Mom Is a Dirty Slut/City on the Edge of Forever' (1998)

as Kitty/Jay Leno

Guest appearance as Trey Parker's character's recurring pet cat, Kitty. Later appears again, this time as himself, with his chin featuring missile-firing capabilities.

• 'Lock, Stock, and Two Smoking Barrels' (1998)

as Traffic Warden (Credited as Robert Brydon)

Blink-and-you-miss-it non-speaking (apart from grunts) cameo as a defenseless captured traffic warden in the back of the rookie criminals' van.

• 'Super Troopers' (2001)

as Larry Johnson

Plays the comic foil to Paul Soter's character as a speeding pedestrian pulled over, victim to hearing "meow" at least 10 times.

• 'Stardust' (2007)

as Sextus

Plays the deceased ghost of Prince Sextus, one of several royals in purgatory until a new king is crowned. Sextus having seemingly been severely burned alive prior to his death.

• 'A Fish Called Wanda' (1988)

as Hutchison

Small cameo at the end of the film as an overly-polite posh being pushed aside by Kevin Kline's character.

• 'Blackadder Goes Forth: Private Plane' (1989)

as Baron von Richthoven

Guest appearance as the real-life Red Baron holding Rowan Atkinson's character and Tony Robinson's character prisoner. However, he is quickly vanquished by Rik Mayall's character, who's also his real-life comedy partner.

• 'The Boxtrolls' (2014)

as Mr. Pickles

Plays the lanky one of the henchmen threesome under orders from Ben Kingsley's character.