Megan Wren had befriended the Black Hawk Down star in Los Angeles six months before her disappearance on 31 March (11). Sizemore was then questioned by detectives but was never a suspect in the case.
The 25 year old was found in a home near downtown Los Angeles this week (begs09May11) but no reason has been given for her disappearance.
He says, "I am relieved and happy Megan is safe and sound. It is unfortunate that she did not come forward immediately as this has caused me a lot of concern. However, I am pleased no harm has come to Megan and I wish her and her family the best and I am putting this matter behind me."
Sizemore's manager Charles Lago has denied reports that the actor and Wren were living together, telling People.com the star "had been trying to help her" with personal problems.