The $1 million buy-in World Series of Poker Big One for One Drop is just a month-and-a-half away and the limited seats on offer are quickly starting to fill. Adding to the 23 participants confirmed in March, WSOP officials have revealed that 10 more players will battle it out for what could be the biggest first place prize in sports history, bringing the total to 33. WSOP officials announced on Thursday that the total attendance is now nearing 40.

The recent additions to the list include Anthony Gregg, last year’s winner of the One Drop High Roller Event; Igor Kurganov, the top Russian money winner; and five German poker pros. Joining that group are the notable entries of Vanessa Selbst, the first female participant in the tourney, and Jean-Robert Bellande (pictured), a one-time contestant in the reality show “Survivor.”

Selbst, a two-time WSOP bracelet winner, has over $9.6 million in live tournament earnings and is considered one of the best female players in the game. “I’m so excited to be taking part in the Big One for One Drop this year,” she said. “I didn’t get to play in 2012, but after seeing how much fun everyone had with the event as well as how profound an impact it had on One Drop, I knew I had to be a part of it this time around.”

Bellande, who has developed a social media following with his high-stakes poker antics, surprised and delighted his followers by posting a picture of himself on his Instagram feed holding bricks of cash while buying into the event. “There goes a milly! I just bought into the 1-Drop. If I win this, it’ll be brokeliving no more,” he posted.

Conspicuously absent from the list is six-time WSOP bracelet winner Daniel Negreanu (pictured). The PokerStars pro isn’t keen on putting up 100% of the massive buy-in himself and has been soliciting investors on Twitter. “I’ll be selling 50% of my action for the One Drop $1 million buy-in this year. Get at me if you want to buy a piece. $5k minimum,” he posted. “Oh, and I’m gonna win and all that,” he added.

Phil Hellmuth is another big name who hasn’t made the decision to risk the seven-figure chunk of his bankroll, reportedly saying that he would see how he was playing before he commits.

The inaugural Big One for One Drop event was held at the 2012 WSOP and won by Antonio Esfandiari. The 35-year-old bested a field of 48 players and took home a massive $18.3 million payday, bumping his total live tournament winnings to over $26 million, becoming tournament poker’s all-time money leader. In 2013, he came close to another One Drop win, taking fourth place and $1.4 million in the $100,000 version.

While some players are still searching for backers, organizers believe that all 56 seats that are available will eventually be claimed. If participation reaches its cap, they boast that the first prize payout will be in excess of $20 million.

Of the 33 seats that have been locked up, three have been reserved for the winners of high-stakes satellites. On June 28, the Rio will hold a $25,300 satellite and give players several opportunities to “step” their way up with buy-ins as low as $200. Here were the first 23 entrants.

As part of its charitable offering to the One Drop Foundation, the WSOP will not collect any fee from the tournament and, instead, $111,111 will be donated from each player’s buy-in. Tournament money winners will also be given the chance to make donations at the end of the event if they choose to do so.

Guy Laliberte (pictured), the billionaire creator of Cirque du Soleil and former space tourist, founded One Drop. The organization’s mission is to stamp out poverty by providing access to clean drinking water around the world. Laliberte is an avid poker player who enjoys playing the highest stakes available and has reportedly lost tens of millions of dollars through his various Full Tilt Poker accounts.

The Big One for One Drop will kick off on June 29 and run until July 1 as part of the 45th annual World Series of Poker. ESPN will film the entire event and broadcast the footage to the world in three-day blocks on July 29, August 5, and August 12.

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