Robert Reiner was born in New York City, to Estelle Reiner and Emmy-winning actor, comedian, writer, and producer Carl Reiner.
As a child, he often looked up to his father as his inspiration and role-model. Carl Reiner was on The Dick Van Dyke Show, which he created and also starred in. Estelle was the inspiration for Rob Reiner to become a director. Her history as a singer helped him understand how music was used in a scene. Rob often felt pressured about measuring up to his father's twelve Emmys, and prestigious awards and successful streak.
Reiner also is known as a political activist, co-founding the American Foundation For Equal Rights, a group that was an advisory for same-sex-marriage. Reiner has spoken at several rallies on several controversial topics, and is also seen as an advocate on social issues, such as domestic violence and tobacco use.