We all get older, and Father Time is undefeated. These are facts, and there is nothing wrong with aging gracefully, but there are some people who try to fight against the aging process and only end up making things worse. In this article you'll see celebrities who have aged, but have also drastically changed.
You might remember Claudia Wells as the cute girlfriend of Michael J. Fox's character in the smash sci-fi classic, Back II The Future. However, when you look at what she looks like today you will be shocked, because she doesn't look like an older version of her younger self, but a completely different person.
Perhaps it's because they had work done, or maybe it's just the stress of being in the limelight, but these folks are struggling with coming to grips with getting older.
The mom from Home Alone, Mrs. McCallister, to the girl who fell in love with a ghost in Casper, you'll have trouble identifying the actors and actresses you'll see below.
Scroll through to see 14 celebrities that time has not been very kind to. Leave a comment letting us know who has changed the most, and what you think caused these drastic changes.
1 - Jamie Lee Curtis (Halloween and My Girl)

2 - Tom Felton (Harry Potter film series)

3 - Claudia Wells (Back II The Future)

4 - Winona Ryder (Beetlejuice)

5 - Denise Richards (Starship Troopers)

6 - Catherine O'Hara (Mom from Home Alone)

7 - Will Ferrell (Elf)

8 - Cristina Ricci (Casper)

10 - Kirstie Alley (Cheers)

11 - Geri Halliwell (Ginger Spice from Spice Girls)

12 - Claire Danes (Romeo & Juliet)

13 - Laura Dern (Jurassic Park)

14 - Christopher Lloyd (Doc Brown from Back II The Future)

15 - Jennifer Love Hewitt (Can't Hardly Wait)

Which one changed the most?