[2] His father, Kip King (né Jerome Kattan; 1937–2010), was born to Jewish parents from Iraq and Poland and worked as an actor and voice artist.

[7] Kattan also did some minor roles on TV, including the second episode of the second season of NewsRadio, "No, This Is Not Based Entirely on Julie's Life", as a photo shop employee.

In August 2009, Kattan starred in the Independent Film Channel (IFC) miniseries Bollywood Hero, where he portrays himself and the difficulties he faces after a career as a comic actor, trying to attain leading man status.

He played himself portraying Jed Mosely, the film's villain, which the screenwriter bases on his girlfriend's ex-fiancé, series protagonist, Ted Mosby.

[9] On December 17, 2011, Kattan made a guest appearance on the Saturday Night Live Christmas show, hosted by Jimmy Fallon, and again briefly on the final episode of SNL's 37th season.

In June 2014, Kattan reprised his role as former SNL character Mango in a preview of the music video for Sharaya J's "Shut It Down", featured in a fashion campaign by Alexander Wang.

[16] On March 25, 2023, Kattan proposed to his girlfriend, Maria Libri, a writer and former on-air personality, in front of the stage at a Wilco concert held at the Riviera Theatre, while the Chicago band played "I'm the Man Who Loves You."

[18] In his 2019 memoir, Kattan claimed that he broke his neck while filming an SNL sketch parodying The Golden Girls, during which he threw himself backwards on a chair.

[19] In 2019, Kattan published a memoir, titled Baby Don’t Hurt Me: Stories and Scars from Saturday Night Live, which included the accident on SNL.