Just weeks after Jennifer Lopez went public with her new 24-year-old boyfriend, Casper Smart, her estranged husband, Marc Anthony, is following suit!

After stepping out with a beautiful blonde during the Miami Dolphins home football game on Dec. 11, Life & Style can reveal that Marc's mystery woman is Mexican model Adriana Ontiveros.

"It's new, but he is dating," an insider reveals in the new issue of Life & Style, on newsstands now.

In fact, multiple eyewitnesses saw Marc getting close with the 28-year-old beauty as they left the game.

"They exited the stadium via a private entrance and stepped out of the elevator together," an onlooker tells Life & Style. "They were holding hands, and he seemed very comfortable with her. He wasn't flaunting it."

The couple are rumored to have met through mutual friend and singer Alejandro Fernandez, with whom Adriana collaborated on the music video for Alejandro's song "Se Me Va la Voz" (I Lose My Voice).

Marc, 43, and Jennifer, 42, called it quits after seven years of marriage in July and have 3-year-old twins, Max and Emme.

Photo Credit: Startraks; Memo Mexíco