Maria Menounos shared on Instagram that her mother is battling a brain tumor.

The E! News anchor wrote Tuesday, "And so our journey begins. Mom is battling a brain tumor."

Menounos also shared that her mother Litsa arrived in Los Angeles for treatment. She asked for fans to prayer for her.

"Thank you to everyone sending love and support at this time," the 38-year-old wrote. "Please pray for her full recovery."

Menounos, who recently became engaged to her long-time boyfriend Keven Undergaro, said her mom is a "champion."