I just watched a movie that had a famous actress in it. She has been famous since her early 20's. Her age is really starting to show though. she could have used some anti wrinkle creams that work. She played the part of a woman kidnapped by a secret agent for the purpose of being a mule. He kidnapped her because he was attracted to her. It didn't feel realistic to me because her age was really starting to show. Her skin didn't look quiet right and there were wrinkles at the corners of her eyes. A man like that would have chosen a young woman. Its a biological fact that the woman with the best reproductive power such as a young woman has will win over an older woman.
In books I've read about writing romances this is discussed as well. They don't recommend you using a heroine older than 25 because its not convincing.