 | SEGAL (2025) as Self |
 | Ex-Husbands (2024) as Simon Pearce |
 | You People (2023) as Dr. Green |
 | Natalie Wood: What Remains Behind (2020) as Self |
 | Magician: The Astonishing Life and Work of Orson Welles (2014) as Self - Filmmaker |
 | Pablo (2012) as Self |
 | Henry Poole Is Here (2008) as Dr. Fancher |
 | Keeping Up with the Steins (2006) as Ken |
 | The Goodbye Girl (2004) as Oliver Frey |
 | Marci X (2003) as Ben Feld |
 | Halloween: A Cut Above the Rest (2003) as Peter Martin (archive footage) (uncredited) |
 | AFI's 100 Years... 100 Passions: America's Greatest Love Stories (2002) as Self |
 | The Shrink Is In (2001) as Samantha's Editor (uncredited) |
 | The Pentagon Wars (1998) as Casper Weinberger |
 | Deconstructing Harry (1997) as Ken |
 | First Works (1989) as Self |
 | Packin' It In (1983) as Gary Webber |
 | Natalie - A Tribute to a Very Special Lady (1982) |
 | Saturday the 14th (1981) as John |
 | First Family (1980) as Press Secretary Bunthorne |
 | Witches' Brew (1980) as Joshua Lightman |
 | How to Beat the High Cost of Living (1980) as Albert |
 | The Last Married Couple in America (1980) as Marv Cooper |
 | Scavenger Hunt (1979) as Stuart Selsome |
 | Love at First Bite (1979) as Dr. Jeffery Rosenberg / Van Helsing |
 | Fame (1978) as Meyer Shine |
 | House Calls (1978) as Dr. Norman Solomon |
 | No Room to Run (1977) as Nick Loomis |
 | The Sunshine Boys (1975) as Ben Clark |
 | The Lion Roars Again (1975) as Self |
 | Westworld (1973) as Peter Martin |
 | The Last of Sheila (1973) as Tom Parkman |
 | On Location with Westworld (1973) as Self (uncredited) |
 | Portnoy's Complaint (1972) as Alexander Portnoy |
 | The Steagle (1971) as Harold Weiss |
 | The Marriage of a Young Stockbroker (1971) as William Alren |
 | Diary of a Mad Housewife (1970) as Jonathan Balser |
 | Catch-22 (1970) as Maj. Danby |
 | Goodbye, Columbus (1969) as Neil Klugman |
 | Ida Western Exile Thanks |
 | A Little Thing Called Murder Director |
| | The Goodbye Girl Director |
| | The Goodbye Girl Producer |
| | Marci X Director |
| | The Shrink Is In Director |
 | Laughter on the 23rd Floor Director |
 | The Sports Pages Director |
 | Tourist Trap Director |
| | The Pentagon Wars Director |
 | Mrs. Winterbourne Director |
 | Milk Money Director |
 | Made in America Director |
 | Mermaids Director |
 | Downtown Director |
 | My Stepmother Is an Alien Director |
 | Little Nikita Director |
 | The Money Pit Director |
 | City Heat Director |
 | Racing with the Moon Director |
 | My Favorite Year Director |
| | Back of Book Director |
