Children: Molly Tambor (b. 1975) and Gabriel Kasper (b. December 10th 2004).

He originally played Tom Abernathy in Miss Congeniality 2: Armed & Fabulous (2005). However, when the scene needed to be re-shot, he was shooting "Arrested Development" (2003), so the scene was re-shot with Stephen Tobolowsky. The version of the scene with Jeffrey can be seen on the DVD.

Directed a production of "Burn This" at the Skylight Theatre in Los Angeles and is the co-owner of Skylight Books in the Los Feliz area.

He became a father and grandfather in December 2004. His wife Kasia gave birth to son Gabriel Kasper on December 10 and his daughter Molly Tambor gave birth to son Mason Jay Moore on December 14.

In spite of his typically obnoxious or exasperating characters, Tambor is one of the most respected and well-liked character actors working today.

Was a teacher at Milton Katselas` Beverly Hills Playhouse.