Joan and Melissa Rivers
Comedienne Joan Rivers and TV personality Melissa Rivers attend the Elie Tahari Fall/Winter 2011 collection show during New York Fashion Week Feb. 16, 2011. Reuters/Eric Thayer

Thursday marks the 84th birthday of the late comedian Joan Rivers, who died at the age of 81 three years ago. The star died Sept. 4, 2014 after spending nearly a week on life support at New York’s Mount Sinai Hospital following a cardiac arrest that took place during a nonsurgical procedure at the Yorkville Endoscopy clinic.

Earlier this week, Rivers was honored posthumously as she featured in a new campaign for People for the Ethical Treatment of Animals (PETA). Rivers' new campaign, which uses one of her trademark jokes to encourage people to adopt animals, was released by PETA.

"A study says owning a dog makes you 10 years younger," she said in the campaign, via E! News. "My first thought was to rescue 2 more, but I don't want to go through menopause again." The image of Rivers used in the campaign was shared with PETA by the comedian's daughter Melissa.

Rivers, who took part in numerous campaigns for PETA, told People magazine in 2010: "I love rescues and runts. It's always the one that gets pushed aside that needs the love and will love you back that much more."

Remembering the former "Fashion Police" star, here are some of her quotes, courtesy of Brainy Quotes.

1. "People say that money is not the key to happiness, but I always figured if you have enough money, you can have a key made."

2. "Thank God we're living in a country where the sky's the limit, the stores are open late and you can shop in bed thanks to television."

3. "I’ve had so much plastic surgery when I die they will donate my body to Tupperware."

4. "Life goes by fast. Enjoy it. Calm down. It's all funny. Next. Everyone gets so upset about the wrong things."

5. "Don't follow any advice, no matter how good, until you feel as deeply in your spirit as you think in your mind that the counsel is wise."

6. "I'm Jewish. I don't work out. If God had wanted us to bend over, He would have put diamonds on the floor."

7. "The worst thing that ever happened to me on stage is someone ran forward to tell me they loved me and projectile vomited all over the stage. It was horrible."

8. "I knew I was an unwanted baby when I saw that my bath toys were a toaster and a radio."

9. "It's like, God, I'm in my 80s. Nobody, when I die, is going to say, 'How young?' They're going to say she had a great ride."

10. "As comedians, we are all laughing because life is so horrible. Life is so difficult, and I cope with it by making jokes about absolutely everything."

11. "I could pull my living in and live OK, but I don't want to live OK. I'm very happy to live in my penthouse, very happy I can pick up a check, very happy to have a great life and be able to spread my wealth a little bit."

12. "When you whisper about something, it's too big, and you can't get it under control and take control of it."

13. "Anyone that says looks don't count is lying. Of course, they do. Even babies go to the attractive face. It's the way humans work."

14. "I think anyone who's perfectly happy isn't particularly funny."