The Mad Men star admits he turned down the request because he was unemployed and broke at the time, even though his pal told him he wouldn't have to be a part of the youngster's upbringing.
Hamm tells Fox411, ""I have actually been asked to be a father by a friend who wanted to have a kid. It was kind of weird and out-of-nowhere and I said no. Mainly because I was totally unemployed, and I would feel so responsible, even though they said, 'Don't worry, no strings attached.'""
Hamm has been in a relationship with his partner Jennifer Westfeldt for 15 years and insists he has no plans to start a family of his own.