10/09/2013 at 10:25 AM EDT
Chloë Grace Moretz brought a very special plus-one to the premiere of her film Carrie
– her mom.
The actress, 16, hit the carpet Monday in a floor-length Valentino dress and was joined by her entire family to celebrate her big night.
The starlet – who had asked her Twitter followers last week to pray for her mother
without further elaboration – was excited to have her join in the festivities.
"She's here and she's looking hot," Moretz told PEOPLE with a laugh at the ArcLight Cinemas in Hollywood. "Teri is looking hot."
Though her family shied away from the cameras on the carpet, the actress said her mom was doing "great."
Earlier this year, Moretz opened up to InStyle U.K.
about her mom's cancer battle when she was 10, calling it "scary and hard." It is unclear whether that illness is related to Moretz's recent plea.