Katie Holmes has taken a big step in her relationship with Jamie with three little words: I. Love. You.

Holmes dropped that precious phrase during a phone call with Foxx while getting off her flight at Los Angeles' LAX Airport recently, according to Us Weekly.

"She said she loved him," a source told Us. "She always gushes about how amazing he is and the joy he brings into the world."

The feeling is mutual between the couple. Foxx refers to the 36-year-old actress as "my girl" when speaking with his friends. Example: "My girl is calling."

Holmes and the 47-year-old Foxx have shared a low-key relationship since they first hooked up in October 2013, according to Us.

"Jamie is someone she can trust and have fun with," an insider told Us in March.

The couple has spent hours having fun together ever since Holmes and her 8-year-old daughter Suri moved to their new LA home in August, which is located near Foxx's place. 

He also has two daughters, 18-year-old Corinne and 4-year-old Annalise, born to different women whose identities are unknown.