Angelina Jolie celebrated Salma Hayek's 55th birthday by pushing her face into a cake

• Salma Hayek posted a video of herself celebrating her 55th birthday with several guests.
• Hayek had "Eternals" costar Angelina Jolie shove her face into a cake as part of a Mexican tradition.

Salma Hayek celebrated her birthday with "Eternals" costar Angelina Jolie by her side - participating in a Mexican tradition by having Jolie shove Hayek's face into a cake.

"My brother @hayekstudio and me trying to teach Angie how to do the mexican mordida @angelinajolie," Hayek captioned a video posted on Instagram on Friday. "Mi hermano sami y yo enseñandole a #anjelinajolie como se hace la mordida!"

The video showed Hayek, who turned 55 on Thursday, surrounded by Jolie, her brother Sami Hayek, and other guests. The people chanted "Mordida!" referring to the tradition in which the guest of honor has their face pushed into their birthday cake so that they take the first bite.

Hayek encouraged Jolie to push her, telling her costar to "do it." Then Jolie screamed and covered her mouth after reluctantly shoving Hayek into the cake.

Prior to posting the video, Hayek celebrated her birthday by posting a photo of herself wearing a blue one-piece bathing suit while at a beach.

"Happy 55th birthday to me looking forward to new adventures #grateful," she wrote.

Hayek and Jolie will share the big screen in Marvel's upcoming film "Eternals," which is directed by Oscar-winner Chloé Zhao and set for release on November 5.

Hayek and Jolie will play immortals named Ajak and Thena, respectively. The star-studded cast also includes Gemma Chan, Richard Madden, Kumail Nanjiani, and Brian Tyree Henry.