A look at some of the "100 days out" festivities from today in New York and London:

Former U.S. Olympic greats Carl Lewis, Shannon Miller and Greg Louganis meet up with London hopeful Allyson Felix (second from right) in Times Square. Felix is attempting to pull off the 200-400 double this summer.

Chris Trotman/USOC/Getty Images

Fairly quiet in London? A handful of official countdown clocks, like this one in Trafalgar Square, reminded the locals of what's to come in July.

Press Association/AP Images

Ralph Lauren is charged with designing the looks for U.S. Olympians this summer. We got a sneak peek at the closing ceremony outfits Monday. Rebecca Soni, Aly Raisman, Tony Azevedo, Bryan Clay, Diana Lopez and Steven Lopez modeled them for "Today."

Jeff Zelevansky/Getty Images for USOC

Performance artist David Garibaldi worked his magic in Times Square. (Check out his work here.)

Chris Trotman/Getty Images

Missy Franklin, whom some have called "the female Michael Phelps," checked in with "Today" show host Matt Lauer in New York.

Jeff Zelevansky/Getty Images for USOCMissy Franklin checked in with "Today" show host Matt Lauer in New York on Wednesday.