Lisa Rinna's Father Frank Rinna Passes Away

— -- Lisa Rinna announced that her father, Frank, has died.

"The Real Housewives of Beverly Hills" star revealed the news on Instagram Thursday by posting a picture of her late father and mother Lois. She captioned the photo, "The World lost a Great Man today......Heaven got a great Angel. I love you Dad."

Rinna, 52, reflected on how hard it was to watch her parents grow older in a blog post on Bravo.

"It's so hard living as far from my aging parents as I do," she wrote last month. "As blessed as I feel to still have both of my parents here on this earth with me, it's hard to know that my dad just doesn't want to be here anymore. I thank God every day, though, that my family, particularly my mother, has such a good sense of humor about life."

"Laughter has helped us get through some pretty tough times together and for that I am grateful. I love my parents dearly, though I think my dad's days are numbered," she continued. "It's just a matter of time now. Please say prayers for him to go peacefully."

The reality TV star thanked fans Thursday night for supporting her through this tough time.

"Thank you for all of your kind messages," she tweeted. "My family and I so appreciate all of the love. Dad passed singing "My Way" Sinatra was his fav."