1. Billie Eilish and Finneas O'Connell now:

illie Eilish and Finneas O'Connell back in the day:
2. Jaden and Willow Smith now:

Jaden and Willow Smith a long time ago:

3. Khloe, Kim, and Kourtney Kardashian now:

Khloe, Kim, and Kourtney Kardashian forever ago:
4. Kylie and Kendall Jenner now:

Kylie and Kendall Jenner way back when:
5. Solange and Beyoncé now:

Solange and Beyoncé long ago:
6. Chloe, Cara, and Poppy Delevingne now:

Chloe, Cara, and Poppy Delevingne as kids:
7. The Jonas Brothers now:

The Jonas Brothers years ago:
8. Serena and Venus Williams now:

Serena and Venus Williams as kids:

9. Ashlee and Jessica Simpson now:

Ashlee and Jessica Simpson in the old days:
10. Frankie and Ariana Grande now:
Frankie and Ariana Grande then:
#TBT to when @ArianaGrande was Dorothy, @joangrande played the wicked witch's sista & I was in the middle of puberty.
11. Bella and Gigi Hadid now:

Bella and Gigi Hadid some time ago:
12. Cole and Dylan Sprouse now:

Cole and Dylan Sprouse in the past:

13. Tamera and Tia Mowry now:

Tamera and Tia Mowry eons ago:
14. Miley and Noah Cyrus now:

Miley and Noah Cyrus many years ago:
15. Aly and AJ now:

Aly and AJ back in the day:
#tbt
16. Chris and Liam Hemsworth now:

Chris and Liam Hemsworth back then:
17. Paris and Nicky Hilton now:

Paris and Nicky Hilton then:

18. Mary-Kate, Ashley, and Elizabeth Olsen now:

Mary-Kate, Ashley, and Elizabeth Olsen back then:
19. Zooey and Emily Deschanel now:

Zooey and Emily Deschanel years ago:
20. Britney and Jamie Lynn Spears now:

Britney and Jamie Lynn Spears then:

21. Hilary and Haylie Duff now:

Hilary and Haylie Duff long ago:
22. Tracee Ellis Ross and Evan Ross now:

Tracee Ellis Ross and Evan Ross decades ago:

23. Jake and Maggie Gyllenhaal now:

Jake and Maggie Gyllenhaal ages ago:

24. John and Joan Cusack now:

John and Joan Cusack a loooong time ago:

25. Prince William and Harry now:

Prince William and Harry a long time ago:

26. Raini and Rico Rodriguez now:

Raini and Rico Rodriguez way back when:
27. Nicole and Sofia Richie now:
Nicole and Sofia Richie then:

28. Jessica and Joshua Alba now:

Jessica and Joshua Alba way back when:
29. Alec, Daniel, Stephen, and William Baldwin now:

Alec, Daniel, Stephen, and William Baldwin back in the day:

30. Julianne and Derek Hough now:

Julianne and Derek Hough back then:

31. Chad and Rob Lowe now:

Chad and Rob Lowe in days past:
