How old was Mamie Gummer in The Lifeguard?

It's common to wonder how old a celebrity was when they starred in a particular film. That kind of trivia can make the viewing experience even richer. Here’s the age that matched the moment.

In the movie The Lifeguard, Mamie Gummer was:

29 years old

That’s the confirmed age we calculated for the celebrity in that role.

To determine the age, we considered the first day of the year The Lifeguard premiered:

January 1, 2013

And the birth date of Mamie Gummer:

August 03, 1983

Movies tend to be released within a year of filming, so Mamie Gummer may have been one year off from the listed age in certain scenes.