Courteney became a household name when she joined the cast of "Friends" as high-strung chef Monica Geller. But the sitcom that made her a star may not be her biggest hit. The mom of 8-year-old daughter Coco with ex-husband David Arquette was nominated for a Golden Globe for her role as a divorced mom learning to date again in "Cougar Town." (Courteney has also produced and directed the series.) Sadly, when the hilarious actress suffered from post-natal depression six months after giving birth to her daughter, it was no laughing matter.