A message from the 52-year-old star was shared on Twitter Sept. 4, which marked the sixth anniversary of her mother's death.
"It's hard to believe that my mother has been gone for six years now," Melissa wrote alongside an old photo of her with the trailblazing comedian. "Not a day goes by where I don't think about her—her words still guide me and of course make me laugh. I miss her dearly."
Joan died at the age of 81 in 2014. The news came days after the E! Fashion Police host suffered complications while undergoing a throat operation in New York. Joan was later laid to rest at Temple Emanu-El in Manhattan.
"My mother's greatest legacy—that's sort of the big question everybody keeps asking me," Melissa said during a July 2015 interview with AARP. "They say, 'Oh, their children are their great legacy or their grandchildren are their great legacy.' But honestly, I think my mother's legacy is laughter. You think of her and you laugh."
Joan was born on June 8, 1933. During her lifetime, she brought joy to numerous audiences through her work as a comedian, an actress and a television host. She also received numerous accolades, including a Daytime Emmy, and was posthumously inducted into the Television Academy Hall of Fame in 2017.
To look back at her career and life in pictures, see the gallery below.
To read more about her legacy, click here.