And on her special day, Keri Russell chose to spend it with her love of three-and-a-half years, Matthew Rhys.
For their romantic Brooklyn stroll on Thursday, the birthday girl walked hand-in-hand with her man, with the two having a laugh at one point.
Now living in Los Angeles, he has starred opposite Anthony Hopkins in the film Titus, but is now better known as the gay lawyer Kevin Walker in the US hit television series Brothers And Sisters.
Within the microcosm of a film you get drawn to people.
They did exactly what they wanted and they weren't scared of what other people thought of them, which must be a liberating feeling - rather like Sienna.
There's too much competition in the film industry now for their sort of behaviour.
There are certain projects you care enormously about, and The Edge Of Love was one because I was portraying a great hero of mine, Dylan Thomas.
Sometimes, you invest a little more in a part than you need to.
Keri and Russell star on the hit show The Americans, and eventually the co-stars started dating.But I'm not with anyone, so that's the one lacking element at the moment.I think my mother would be very happy if I found a nice Welsh girl.In May 2016, the couple welcomed son Sam, 10 months.This is the first child for Matthew, while Keri shares son River, nine, and daughter Willa, five, with ex-husband Shane Deary.