Jamie Lee Curtis celebrates becoming a 'movie grandmother' after Lindsay Lohan welcomes her first child

• Jamie Lee Curtis is celebrating the arrival of her "movie daughter" Lindsay Lohan's baby boy.
• Lohan's rep confirmed the actor welcomed a son with her husband Bader Shammas on Monday.

It's been announced that Lindsay Lohan has given birth to her first child, and her "Freaky Friday" costar Jamie Lee Curtis couldn't be happier for her.

Lohan's representative confirmed to People on Monday that the "Parent Trap" actor and her husband Bader Shammas had welcomed their first child in Dubai, UAE, where the couple resides.

The rep said their "beautiful, healthy son" has been given the name Luai, which is an Arabic name meaning "shield or protector." His exact date of birth has not been shared.

Taking to Instagram to celebrate the happy news, Curtis shared a throwback photo of herself and Lohan, taken around the time they starred as mom and daughter Tess and Anna Coleman in the 2003 body-swap comedy.

In the right-hand corner, a small picture of the two stars in costume as their characters could be seen.

"MAGIC MONDAY! My movie daughter just made me a movie grandmother," Curtis captioned the post.

"Blessings to Lindsay and Bader for the birth of Luai! @lindsaylohan."

In the 20 years that have passed since the film was released, the costars have remained close, with Lohan revealing in June that the "Everything Everywhere All At Once" star had given her some advice on motherhood.

"I spoke to Jamie Lee Curtis recently, and she was like, 'You just bring the baby with you and everything will be fine," Lohan told Allure.

Earlier this year, both Curtis and Lohan expressed their interest in reuniting for a "Freaky Friday" sequel.

Speaking to The New York Times in honor of the 20th anniversary of the film's release, Curtis said that this year it's "going to happen."

"As I went around the world with 'Halloween Ends,' people wanted to know if there was going to be another 'Freaky Friday.' Something really touched a chord," she said. "When I came back, I called my friends at Disney and said, 'It feels like there's a movie to be made.'"

"Jamie and I are both open to that, so we're leaving it in the hands that be," Lohan added. "We would only make something that people would absolutely adore."