Andre Agassi and Steffi Graf have married in a small, private ceremony in Las Vegas.
The tennis stars are expecting their first child - a boy - in December.
Agassi, 31, and Graf, 32, began dating after each won their side of the French Open in 1999. Graf retired in 1999.
In a joint statement the couple said: "We are so blessed to be married and starting this chapter of our lives.
"The privacy and intimacy of our ceremony was beautiful and reflective of all we value."
Agassi was previously married to actress Brooke Shields. It is Graf's first marriage.
In September, Agassi said the couple planned to hold off marriage until after their son was born.
He said at the time that he and Graf would wait to marry "until the little one is around and everybody (has) kind of recovered".
The couple recently bought a $23m (£15m) home in the San Francisco Bay area.