ABC News January 2, 2017

Billie Lourd Breaks Her Silence After the Deaths of Carrie Fisher and Debbie Reynolds

WATCH: Todd Fisher Addresses Carrie Fisher's and Debbie Reynolds' Recent Deaths

Speaking out for the first time since her mother, Carrie Fisher, and grandmother, Debbie Reynolds, died, "Scream Queens" actress Billie Lourd posted an Instagram photo of herself as a child with her mom and grandma, along with a message to fans.

“Receiving all of your prayers and kind words over the past week has given me strength during a time I thought strength could not exist,” Lourd, 24, wrote today. “There are no words to express how much I will miss my Abadaba and my one and only Momby. Your love and support means the world to me.”

Mark Hamill Opens Up About His Friendship With Carrie Fisher It Was Debbie Reynolds' 'Destiny' to Be With Carrie Fisher, Todd Fisher Says Billie Lourd's 'Scream Queens' Co-Stars Send Support After Fisher, Reynolds Deaths

Fisher, 60, died Dec. 27, four days after going into cardiac arrest while on an airplane. Reynolds, 84, died a day later after suffering a stroke, her family said.

Reynolds’ son, Todd Fisher, confirmed to ABC News that the family is planning a joint funeral for the two iconic actresses.