Anthony Steven Kalloniatis (born August 23, 1967), known by his stage name Ant, is an American stand-up comedian, actor, and TV show host.

Ant performed at comedy clubs across the US beginning in 1991. In 1995, he was a semi-regular cast member on the WB series Unhappily Ever After, spending four seasons on the sitcom. He appeared as a contestant on Last Comic Standing, competing in seasons two and three.

He hosted VH1’s reality series Celebrity Fit Club, and was a regular judge of talent on Steve Harvey's Big Time. His television series U.S. of Ant premiered on MTV's gay-targeted Logo cable channel in the summer of 2006. He frequently appeared as a commentator on shows such as VH1's Best Week Ever and CNBC's Dennis Miller, and was a regular guest on The Tyra Banks Show, The Tonight Show with Jay Leno as well as The Howard Stern Show.

In 2007, he appeared along with Snoop Dogg as a guest star on MTV's sketch comedy show Short Circuit. He also appeared as a regular celebrity guest on the game show To Tell the Truth, alongside Jackée Harry, Meshach Taylor and John O'Hurley.

In 2008, he was a contestant on VH1's reality competition Celebracadabra, where celebrities trained with established magicians, and competed in an elimination-format contest.

He is a former host of the Second Chances podcast with comedian Greg Baldwin.