Pregnant actress Jessica Alba has some words of wisdom for young girls who are in a relationship.

In a recent interview for CosmoGIRL magazine, which also features the actress on the cover page, Alba said that young girls should wait for at least a year before succumbing to their partners' wishes.

"Most guys, especially when they're younger, really are only after one thing. To all the girls out there, I don't want to say, 'Don't give your heart to somebody like that,' But wait at least a good year," People quoted her, as telling the mag.

"You can be in a relationship and do some things, have fun, get to know each other - but don't give them everything," she added.

Addressing the issue more seriously, the 26-year-old actress cited her own example, saying that she also committed the same mistake as a youngster.

"That was something I did at a young age, fell in love and gave him my everything, and I was left with nothing," she said.

"It took me a long time to put myself back together, and I wish someone would have told me back them to hang on to some of myself," she added.

Alba recently confirmed reports of her engagement to long-time beau Cash Warren.