Happy Birthday! How wonderful that you were able to capture this important moment in his (your?) family. I'm not a fan of the heavy vignetting here - it's too dark, especially given the cheery occasion.
I'm with Stella on the vignetting, but then I myself don't like vignetting at all. But if it were only in the corners.... maybe I'd have been able to overlook it. But not here. Looks like suddenly some spotlight shone on him.