1.Sir Ian McKellen shared this glorious shot that is more than five decades old...he's posing outside the SAME theater that he will be performing King Lear at starting this Friday!
2.It's not from one celeb, but whoever is running the Backstreet Boys' Twitter account shared this too-good-to-be-true gem from back in the day.
3.Kenny G (who is low-key AMAZING at social media) tweeted out this super saxy photo from the '90s.
4.Josh Peck showed off his throwback fashion sense in this Planet Hollywood vest, and all I want to know is if it comes in an adult medium.
5.Ice T posted this (low-res LOL) picture with fellow rapper Fat Joe.
6.Here's a throwback photo Skylar Astin shared where he's holding a dove (Benji's!!!) on the set of Pitch Perfect.
7.Danny Trejo shared this pic of him posing with his stunt double from Machete Kills.
8.Dancing With The Stars cast member Cheryl Burke shared this oh-so-cute picture of herself as a little girl (and is it me or does the girl behind her look like a child version of Brittany from GLEE?)
9.Gillian Anderson got punny with this picture she posted (just read the caption).
10.Mackenzie and Maddie Ziegler look ADORABLE in this shot which is probably from like, 2011.
11.Gina Gershon. Jennifer Tilly. Mid-'90s fashion. Need I say more?
12.And finally, since it *IS* September 21, Common shared this clip of Earth, Wind & Fire!