Wilson was hospitalized in August after making an attempt on his life at his Santa Monica, California, home.
He is now back at home and being looked after by a paid 'companion'--and Stiller reveals he is making a good recovery.
The actor tells talk-show host Ellen DeGeneres--in an interview due to air on Friday--"He's doing really well. I sort of like to protect his privacy, 'cause I feel like it's his own thing.
"But he's a really good friend of mine. He's an incredible guy and I wish him, as everybody does, all the best."
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