Vince Vaughn's getting in good with Jennifer Aniston - and her friends.

It looks like Vince Vaughn isn’t going to be out of Jennifer Aniston’s life anytime soon. The actor has won over her good friend, Courteney Cox, who has even agreed to go on a Caribbean vacation with Jennifer and Vince. A source for Star magazine said, "Courteney was wary of Vince for a long time. It's a pretty big deal that Courteney would want to go on vacation and have Vince come along. She thought he was trouble, but she now sees how taken Jen is with him, and after eight months, he's still hanging around!"

The Caribbean jaunt is the latest in a series of vacations the lovebirds have taken recently. On a trip to Telluride, Colorado, Vince made sure that Jen got her fair share of indulgences in. The actress is normally very cautious about what she eats, but Vince has persuaded her to go easy on the dieting. Star claims Vaughn ordered blueberry pie, crème brulée, and fried crab cakes for his girl in Telluride and then “came clean about wanting Jen to put on 20 pounds!" Aniston was thrilled with Vince’s suggestion and an insider said, “She knows weight gain is going to be par for the course if she gets pregnant this year.�?

Jen’s waistline isn’t the only thing on Vaughn’s mind. He’s also eager for her to get over her problems with Angelina Jolie and ex-husband Brad Pitt. A friend of the couple told Star, "Vince told Angelina's manager he's ready to help Jen put the feuding and competition behind them.�? An end to the bad feelings between the two couples would help Vaughn to win back Angelina and Brad as friends. He co-starred with them in Mr. & Mrs. Smith, the film that was responsible for the initial rumors about Pitt and Jolie’s relationship.