The former boxing world champion is ranked as the World Boxing Association and BoxRec’s number one boxer in the global middleweight category.
To mark the celebration, 888poker will be hosting several events throughout the year, including a series of player-focused events with its new ambassador.
Eubank Jr said: “Poker is one of the great passions in my life, so I am delighted to partner with 888poker. For me, the beauty of poker is in its community, and 888poker is doing a fantastic job of making poker more about the fun and less about the grind for players at all levels with its user-friendly platform.
"I’m excited to officially kick-start the partnership in the coming months and can’t wait to meet the 888poker community at the tables.”
Amit Berkovich, VP, Head of Poker at 888, added: “I am happy to welcome Chris to the 888poker family as our Cultural Ambassador. The authenticity, integrity, and excitement he brings – whether that’s in the ring or at the poker table – perfectly matches our values and creates a great fit for our brand.
"This is a fantastic partnership and an exciting kick-off for our 20th anniversary year.”
Established in 2002, 888poker is part of 888 Holdings and has become an important online poker destination for players. Since its launch, 888poker has engaged over 15 million players and awarded more than $6bn in tournament prizes globally.