Jessica Alba's first kiss was definitely not what she was expecting it to be, and rather than a magical moment, it was a huge disappointment.

The star revealed that she was 12 years old when she got her first kiss. The only problem was that the guy giving it to her was not only 'gross', he also never brushed his teeth.

"I was 12 years old and had to kiss this guy who was gross and never brushed his teeth," the New York Post quotes her, as telling the July issue of Seventeen.

And, if her first kiss was bad, her second did nothing to improve her opinion of the embrace, almost turning her off kissing altogether.

"Then, at 14, I had to kiss a guy who was 32 or 33, and I was like, 'Ewww! I didn't want to do it,'" she says.

Thankfully for Alba, she's now found the man who she admits done much to change her opinion - her boyfriend Cash Warren.

"(He) is the best kisser in the world," she gushes.

The sexy star will now be seen on the big screen when 'Fantastic Four: Rise of the Silver Surfer' hits theatres. She reprises her role as the blonde and beautiful Invisible Woman in it.