The 44-year-old said she didn't land her big break until she was in her late 30s and she never gave up on her hopes of becoming a famous actress, reported Contactmusic.
"Age is just a number. Unless, that is you live in Hollywood, where there's the notion that if you haven't hit it big by your 20s, you may as well hit the road.
"During those broke years, I shared not one but two studio apartments, first with my brother, and then with my pal Karen, sleeping head to foot in the same bed. I never dreamed that one day I would land my breakout role at the ripe old age of 36," she said.
And Walsh, who later received her own spin-off, "Private Practice", is actually relieved she didn't make it big until her later years, saying, "I had been able to actually live life, unobserved, paparazzi-free, and make a ton of mistakes in private."