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    21 Celebrities Who Are Younger Than You Thought

    Get ready to feel real old, real fast.

    CC
    by CC

    Community Contributor

    • 1. Miley Cyrus

      Miley Cyrus

      19

    • 2. Taylor Momsen

      Taylor Momsen

      18

    • 3. Heidi Montag

      Heidi Montag

      25

    • 4. Kelly Pickler

      Kelly Pickler

      25

    • 5. Julianne Hough

      Julianne Hough

      23

    • 6. Hillary Scott (from Lady Antebellum)

      Hillary Scott (from Lady Antebellum)

      25

    • 7. Keira Knightley

      Keira Knightley

      26

    • 8. Adele

      Adele

      23

    • 9. Lady Gaga

      Lady Gaga

      25

    • 10. Katy Perry

      Katy Perry

      27

    • 11. Dakota Fanning

      Dakota Fanning

      17

    • 12. Seth Rogen

      Seth Rogen

      29

    • 13. Abigail Breslin

      Abigail Breslin

      15

    • 14. Angelina Jolie

      Angelina Jolie

      36

    • 15. Saoirse Ronan

      Saoirse Ronan

      17

    • 16. Hailee Steinfeld

      Hailee Steinfeld

      14

    • 17. Taylor Lautner

      Taylor Lautner

      19

    • 18. Emma Stone

      Emma Stone

      23

    • 19. Florence Welch

      Florence Welch

      25

    • 20. Alex Pettyfer

      Alex Pettyfer

      21

    • 21. Olivia Wilde

      Olivia Wilde

      27

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