Lamar Odom has agreed to fight Aaron Carter in a celebrity boxing match in June, TMZ Sports has learned ... and the training is already underway!
41-year-old Odom will take on the 33-year-old Carter at the Showboat Casino in Atlantic City on June 12 in a 3 round exhibition, Celebrity Boxing honcho Damon Feldman tells us.
Besides the age difference ... there's a significant height differential -- Odom is 6'10" and Carter is 6'1".
Odom obviously has a background as a professional athlete -- playing 14 seasons in the NBA.