1 of 12
''I'm an Olympic junkie. I don't normally watch a lot of boxing, but Olympic boxing is the most exciting there is. I love the weight lifting. I love swimming. I love track — I was a high jumper in school. I watch it all! It's ridiculous.''
2 of 12
''I quite like the gymnastics. The concentration that's required on those tiny bars and beams is inspiring — and exhausting.''
3 of 12
''I like the 100 meters because I just want to know who's the fastest person in the world.''
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''Swimming. Secretly I want Michael Phelps to win big again, even though I'm British. I am going against my own country, but that guy is so easy to root for. He's a beast.''
5 of 12
''I like the decathlon. I think it is such a great test of a real, true athlete. They aren't just good at one sport, they are good at 10 of them, and that is an impressive feat.''
6 of 12
''The diving and the gymnastics always blow my mind.''
7 of 12
''I am definitely looking forward to the men's 100-meter. Usain Bolt, Yohan Blake, Asafa Powell, 1-2-3 — it's gonna be one for the ages. There's no better place to watch this race besides the island of Jamaica [where my family lives], and that's exactly where I plan to be.''
8 of 12
NASCAR champ Jimmie Johnson
''I like to watch the opening ceremony and see all the teams from all the countries come together. I have been out of touch this year in terms of the qualifiers and stuff so it will all be fresh and new when the competition starts.''
9 of 12
Grey's Anatomy's Jesse Williams
''I especially love sprinters because I came up in the '80s in the heyday of U.S. sprinters like Flo Jo and Carl Lewis and Jackie Joyner-Kersee.''
10 of 12
''I've always been a fan of gymnastics. As a kid I taught myself how to do back flips and everything, so I always thought that I could do that, but it just never happened.''
11 of 12
''I really want to see what Michael Phelps does this year.''
12 of 12
''I just spoke to Melo [a.k.a. Carmelo Anthony]. He's preparing with the basketball team — and I always enjoy watching him do his thing. The Olympics are amazing. It's like watching one of the Marvel movies. Those athletes have superhuman powers.''
Reporting by Carrie Bell, Mandi Bierly, Christian Blauvelt, Emily Rome, and Erin Strecker