Who's the Best Celebrity Poker Player?

The stakes were high Saturday as celebrities from both big and small screen alike flocked to The London West Hollywood to try their luck at the "Four Kings & an Ace" charity poker tournament.

Held by Mending Kids International, a non-profit organization that provides less-fortunate children all over the world with necessary, often life-saving medical procedures, the tournament attracted such big names as Robert Downey Jr., Jodie Foster, Mel Gibson, Gene Simmons, Danny Trejo, and many more to its tables.

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Gibson, who hosted the event, spoke fondly of the organization, telling ET, "[Mending Kids International] [does] great work. The best thing about this particular charity is that over 95% of anything donated actually gets to where it's supposed to, so there's no big administrative milk. … I think the most exciting thing you can say about the whole thing is, they save lives, and they improve the quality of lives."

Revenge star Madeleine Stowe, who was there with several other cast members from the show including Emily Van Camp and Joshua Bowman, told ET about her own personal experiences with the organization. "I've been doing a lot of work in Haiti since 2008, and during the quake, we had some dire emergencies, children who were critically hurt, and I called doctors at UCLA and USC, and they said, go to Mending Kids," she told ET. "They go all over the world and perform life saving surgeries on impoverished children, and now they're coming to my organization on the ground in Haiti and doing heart clinics there. They're incredible people."

Gene Simmons expressed a slightly more philosophical view on the benefits of the organization, telling ET, "Kids are the innocent victims of mother nature and just all sorts of stuff and it's unfair. They haven't even had a chance to live life. … We are all very lucky, we should help those who are not so lucky. Especially the kids."

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When pressed on his thoughts on who would win the tournament at the end of the night, Simmons confidently responded, "I will. I always win." The poker trophy was ultimately rewarded to player Will Hartman, the night's winner.

For more celebrity reactions, including Jodie Foster's thoughts on why she thinks she's a better poker player than Maverick costar Mel Gibson, click the video!

And for more information on Mending Kids International, click here.