The veteran funnyman broke his leg and suffered facial lacerations after a car reportedly mounted a kerb in New York and struck him, and he was taken to St. Luke's Hospital.
McKean is in a stable condition and he returned to his Twitter.com page late on Wednesday (23May12) to assure fans he's recovering well.
He writes, "Lucky man: best wife, great kids, awesome docs and nurses, priceless friends; a little overwhelmed by the sweet tweets. Love all y'all."
His actress wife Annette O'Toole wrote on her own page, "Thank you dear people for your love and support. (Michael) and I (are) so appreciative. He is getting great care. Spirits are good."