Serena  and Venus Williams pose for a photo while displaying their Miami Dolphins jerseys after it was announced the tennis stars had become minority owners of the NFL football team, during a news conference in Davie, Fla., Tuesday, Aug. 25, 2009.

The sisters are the first female African-Americans to hold an ownership stake in an NFL franchise, the Dolphins said. The league has no African-American majority owner.

Venus said she and Serena have been to “a few games.” Serena dated former NFL players LaVar Arrington and Keyshawn Johnson, but the sisters said the Dolphins have long been their favorite team.

Ross, a New York real estate billionaire, has brought six celebrities into the fold since completing his purchase of the Dolphins from Wayne Huizenga in January. The first partnership was with singer Jimmy Buffett; musicians Gloria and Emilio Estefan and Marc Anthony subsequently bought small shares of the team. The Estefans are the first Cuban-Americans to hold an ownership stake in an NFL team, while Anthony is a New York native of Puerto Rican descent.

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