Time sure does fly, doesn’t it?

Do you ever see a photo of yourself from 5, 10, even 15 years ago and think to yourself, “where did the time go?”

Well, celebrities surely feel that way, too. And now they have a little help from a guy named Ard Gelinck, who Photoshops famous folks side-by-side with recent photos and old pictures from the past.

These are pretty fun, take a look.

1. Anthony Hopkins

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2. Leonardo DiCaprio

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3. Clint Eastwood

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4. Jeff Bridges

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5. Lady Gaga

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6. Bruce Willis

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7. Keanu Reeves

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8. Reese Witherspoon

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9. Haley Joel Osment

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10. Dwayne “The Rock” Johnson

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11. George Clooney

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12. Luke Perry

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13. Brad Pitt

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14. Will Smith

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15. Johnny Depp

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Be sure to follow Gelinck on Instagram so you can keep track of these cool mash-ups!