Mr. Sullivan, portrayed by Brett Cullen, is a character in the fourth series of the Beverly Hills, 90210 continuity.

Mr. Sullivan is the father of Ivy Sullivan. Ivy grows up thinking that her father wants nothing to do with her, only to learn during Season 3 that her mother told him to stay away from her.

However, after meeting with Ivy, he reveals his true motives when he tells her that he was on the hook for her college tuition and wanted to work something out so that he doesn't have to pay for her education. Heartbroken, Ivy declines his invitation and returns home to her mother.