“We are engaged!!!!!!” tweeted 27-year-old Ovechkin, a star for the NHL’s Washington Capitals who is playing in his home country during the lockout that has idled the North American league and threatens to wipe out the entire season.
The accompanying photo showed the pair, both wearing skates, posing arm in arm on a patch of outdoor ice.
Kirilenko, who will turn 26 in January, is a five-time winner on the WTA Tour who has been ranked as high as 12th in the world.
The two have been dating since late last year, and Ovechkin being on hand back in July at the All England Club when she reached the Wimbledon quarter-finals for the first time.