The 'Chloe' actress - who tied the knot with her second husband, director Bart Freundlich in 2003 - admits she only chose to walk down the aisle again to provide their children Caleb, 12, and seven-year-old Liv, with stability.
She said: "For me the only reason to get married was my children. I had a therapist who said marriage is really a container for a family. Freud says you need love and work, and a family and a job give you a balance. One element can't give you everything. You can have friends in movies and plays you make, but they're not your family. And you can't expect family to give you the stimulation work is going to provide, because that is not their responsibility."
Your relationship is never going to be what it was at the start - and the fact it's not is something that we struggle with
Despite her happiness with Bart, 49-year-old Julianne admits their relationship isn't without its struggles and they find it particularly difficult getting time alone away from the children.
She added to the Scotsman website: "Your relationship is never going to be what it was at the start - and the fact it's not is something that we struggle with. My husband and I try to spend time alone, but it is hard because the kids go, 'Why are you going out, you went out last night?' So we try to make time for each other, and maybe take trips away together but we're like everyone else in that respect."
Julianne was previously married to actor Jon Gould Rubin for nine years from 1986.