Jan. 18, 2013 at 9:59 AM ET
Thursday night's interview with Oprah Winfrey officially revealed what most of the public already had known at this point: Cyclist Lance Armstrong took banned substances during his athletic career. It also revealed -- at least based on what he said -- that he's very sorry.
But just watching Armstrong's apology wasn't enough for some Hollywood celebrities. The reactions have been flying fast, furious and funny (also occasionally earnest and serious) on Twitter.
Here's what the celebrities had to say about his admission, his future plans, and why they (or their family members) still support him.