Hilton appeared on the franchise as a 'friend of' during season 12.
Hilton extended her celebration to 'all moms out there,' whom she said are 'the glue that holds everything together.'
The sisters are opening up about their past and being grandmothers.
Kim Richards and Kathy Hilton interview each other and spill the E-Tea in honor of National Sibling Day.
Paris Hilton chats with ET at the New York City release party for her book, 'Paris: The Memoir,' out now.
Kathy Hilton chats with ET about her potential return to 'The Real Housewives of Beverly Hills,' at the Vanity Fair Oscar Party.
Paris and her husband, Carter Reum, welcomed their son in February.
Paris Hilton reveals on her 'This is Paris' podcast that her mom, Kathy Hilton, didn't know about her son until after his birth.
ET gets an inside look at some of Hollywood’s celebrity homes, from Bre Tiesi to Tarek and Heather Rae El Moussa.
Kathy Hilton’s Christmas pajama line with Sant and Able, inspired by her Christmas treasures, is available now.
'I never meant to be disrespectful,' the reality star tells ET.
Paris Hilton chats with ET's Cassie DiLaura at 'The Hollywood Reporter's Women in Entertainment Gala in Los Angeles.
Paris had previously said she and husband Carter always intended on starting a family in 2023.
Lisa Rinna chats with ET's Cassie DiLaura at 'The Hollywood Reporter's Women in Entertainment Gala in Los Angeles.
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