Macaulay Culkin says he's never seen Michael Jackson "do anything improper with anyone."
The actor says he met Jackson when he was nine or ten and has remained friends ever since.
On the stand in California Wednesday, Culkin called molestation allegations against Jackson "absolutely ridiculous."
And, the defense witness flatly denied allegations that Jackson had mishandled him as a boy. Culkin says he learned of allegations that he'd been molested by Jackson from news reports.
Culkin says prosecutors never asked him about the allegations.
During cross-examination, a prosecutor asked if Culkin had rebuffed repeated prosecution efforts to contact him.
Culkin replied, "Not that I know of, no."
The prosecutor also asked if prosecutors had tried to contact him recently when Culkin's lawyer said he wouldn't give a statement to either side before testifying.
Culkin says his lawyer had advised him not to talk in advance.