The 24-year-old actress has uploaded a touching photo of her as a child alongside her mum Carrie Fisher, 60, and grandmother, Debbie Reynolds, 84.
The Scream Queens actress added a caption thanking fans for their immense support after the sudden death of both stars in the final week of 2016.
She wrote, “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.”
“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.”
Perhaps best known for her role as Star Wars’ Princess Leia Organa, actress Carrie Fisher, passed away on December 27, 2016, after suffering a massive heart attack.
At the time, a spokesman to the family released a statement to PEOPLE on behalf of Billie.
The statement read: “It is with a very deep sadness that Billie Lourd confirms that her beloved mother Carrie Fisher passed away at 8:55 this morning.”
“She was loved by the world and she will be missed profoundly,” says Billie, 24. “Our entire family thanks you for your thoughts and prayers.”
In a tragic turn of events, just one day after Carrie’s death, her mother Debbie Reynolds also passed.
According to TMZ, the 84-year-old died from a suspected stroke on Wednesday, December 28.
Her son Todd Fisher, 58, confirmed the awful news, telling the site: "She's with Carrie."
Before her death, Debbie paid tribute to her beloved daughter with a touching Facebook post.
“Thank you to everyone who has embraced the gifts and talents of my beloved and amazing daughter,” she penned.
“I am grateful for your thoughts and prayers that are now guiding her to her next stop.”
Our thoughts are with Billie and the whole family during this difficult time.