Arnold Schwarzenegger, 72 enjoys bike ride with his 45-year old girlfriend in LA

Arnold Schwarzenegger, 72, hit the nearly streets of Los Angeles for a bike ride with girlfriend Heather Milligan, 45, and good friend Ralf Moeller this Mother's Day.

Schwarzenegger split from his wife Maria Shriver in 2011, following the revelation that he fathered a son, Joseph Baena, 22, with his family's former housekeeper Mildred Baena during their marriage.

The actor also has sons Patrick, 26, Christoper, 22, and daughters, Catherine, 30, and Christina, 28, with Shriver.

The former couple were married for 25 years when they called it quits.