The former Playboy model announced her engagement to the Detroit rap-rocker on her Web site last week.
"Yes, I'm finally getting remarried ... I'm in love. I'm happy," Anderson wrote on her Web site.
Anderson, 39, and Rock, 35, whose recordings include 1998's Devil Without a Cause, have been romantically linked since the early 2000s but broke off their relationship in 2003.
The blonde actress, who was discovered while watching a Canadian football game and gained international stardom in the 1990s on the television show Baywatch, was previously married to drummer Tommy Lee of rock band Motley Crue, with whom she had two sons.