Keanu Reeves and Diane Keaton are rumoured to be Hollywood's newest odd couple.

Reeves, 40, and Keaton, 59, who played lovers in the 2003 film "Something's Gotta Give", have become increasingly close in real life, reports Sky News.

Diane has become a frequent visitor to the "Speed" star's Los Angeles home, they speak on the phone a lot and she even attended the ceremony when Keanu received a star on the Hollywood Walk of Fame.

"The Other Sister" actress' past loves include Woody Allen, Al Pacino and Warren Beatty, while Keanu was linked with Amanda De Cadenet.

His ex-girlfriend Jennifer Syme was pregnant with their child in 1999 but the baby was stillborn and Syme was killed two years later in a car accident.