Ewan McGregor grew up to be Alec Guinness (Obi-Wan Kenobi, Star Wars movies). I hope this counts—they’re different movies, but from the same series (and many, many years apart!).
In a charming little movie called Now and Then, Thora Birch grew up to be Melanie Griffith. That I could believe. But, in the same film, Christina Ricci grew up to be Rosie O’Donnell. That I could not believe without the aid of recreational drugs, which at the moment I haven’t got any of.
Ah, I must have been remembering that weird dream I had, in which a teevee doctor guy pretended to be Batman while wearing a tight rubber vest with built-in nipples. I sometimes dream wacko stuff like that after I eat too much spicy food.
Sadly the plot was tweaked so that no one grew up to be Tony Curran
Of course, I had several choices fo many all of these, like I could have picked Ralph Malph for one or maybe Johnny Castle.
[Sean Connery] Nobody puts baby in the corner![/Sean Connery]