McCartney's Genes (2008)

When he learns that his sperm may be defective, small-time rock vocalist Alex (Hamilton von Watts) decides to father a child before it's too late -- if not with his reluctant wife, Jules (Keri Safran), then with his beautiful manager, Claudia (Lisa Sheridan). But when his band gets a shot at the big time, dad-to-be Alex discovers that he's bitten off more than he can chew. This comedy from director Jason S. Dennis also stars Spencer Gibb.

Unfortunately the movie McCartney's Genes is not yet available on HBO Max.