The only blonde the actor is kissing is Jennifer Aniston

Vince Vaughn hasn't been unfaithful to Jennifer Aniston. In fact, they're still dating.

The "Dodgeball: A True Underdog Story" actor is suing several tabloids over a story that he was allegedly kissing a "mystery blonde" after breaking it off with Aniston, reports People.

Vaughn filed papers against The New York Post, The Sun and the Daily Mirror for "published allegations that he was caught kissing a mystery blonde whilst attending a charity event on Sunday (Oct. 8) at London's Old Vic theatre. Mr. Vaughn will say that the articles suggested that he was unfaithful to Ms. Aniston, with whom he had allegedly ended his relationship only a week before.

"Ms. Aniston and Mr. Vaughn had not ended their relationship either at the material time or since. ... The suggestion that he was having a passionate embrace and kiss, or has ever been unfaithful to Ms. Aniston, are false."

These statements support Aniston's recent appearance on "The Oprah Winfrey Show," in which she told the host that they were still together.

Unless it's settled earlier, the case is expected to go to jury trial in London's High Court in 2007.

Vaughn and Aniston started dating on the set of "The Break-Up," which is currently out on video. Vaughn has been taping the holiday comedy "Fred Claus" in London.