1.In honor of her BFF Lisa Bonet's 53rd birthday, Marisa Tomei posted this photo of the two of them in the late '80s:
2.While Lisa's ex-husband, Lenny Kravitz, wished her a happy birthday by sharing this photo of her from the late '80s:
3.Charlize Theron posted this photo of herself rocking a swim cap in the early '90s:
4.MSNBC's Jacob Soboroff shared this photo of himself from the early '90s:
5.In celebration of her 61st birthday, Allison Janney posted this photo of herself as a teen in the '70s:
6.Janet Jackson shared this video clip of herself performing a cover of the Jackson 5's classic "I Want You Back" during a tour as part of the cast of Fame in 1985:
7.In celebration of his 39th birthday, Russell Tovey posted this baby pic of himself from the early '80s:
8.Kim Kardashian shared this photo of herself and Kourtney twinning in the late '80s:
9.Shaun White remembered the simple days of the '00s:
10.Naomi Watts shared some behind-the-scenes photos of herself, Ewan McGregor, and Tom Holland on the set of their 2012 movie, The Impossible:
11.Madonna posted a photo from her first communion in 1967:
12.Natalie Portman remembered her very first film, 1994's The Professional:
13.Courteney Cox celebrated filming concluding on Scream 5 by sharing a photo of herself and Wes Craven on the set of the first film in 1995, as well as some behind-the-scenes photos from the current movie:
14.In anticipation of his new memoir, A Promised Land, Barack Obama talked about fatherhood and shared this photo of himself and Michelle holding their daughters, Malia and Sasha, in the early '00s:
15.And finally, Oprah jumped on the "How it started/How it's going" meme bandwagon by sharing a photo of herself interviewing Barack Obama in 2004 and a photo of herself interviewing him in 2020: