Billie Lourd paid tribute to mom Carrie Fisher on Sunday, her first Mother's Day since the Star Wars actress' untimely death.

Lourd, 24, posted a throwback photo to Instagram, captioned only with a black heart.

In the snap, the young Scream Queens actress sits on smiling Fisher's lap, subtly sticking out her tongue for the camera.

Meanwhile, a bitter family feud has erupted following the shocking deaths of Fisher and her mother, Lourd's grandma, Debbie Reynolds.

The 84-year-old Singing in the Rain superstar tragically passed on Dec. 28, just a day after her daughter died.

"While Debbie lost many millions in her lifetime to scheming husbands and bad business decisions — and even went bankrupt — she was worth a fortune when she died," a source told Breaking Celebrity News. "She left the bulk of her $70 million estate to her children with Eddie Fisher, Carrie and Todd, and Billie Lourd.