Julia Roberts didn't realize just how famous she was about to become until a fan pestered her for an autograph while she was in a bathroom stall.

The 51-year-old actress had just starred in the 1988 film Mystic Pizza at the time of her bathroom encounter.

The Oscar-winner told the story during an appearance on Monday's episode of The Hollywood Reporter's Awards Chatter podcast.

Strange encounter: Julia Roberts didn't realize just how famous she was about to become until a fan pestered her for an autograph while she was in a bathroom stall; shown at the Ben Is Back premiere in New York on December 3

Her breakout role: Here Roberts is seen in the 1988 movie Mystic Pizza with Annabeth Gish and Lili Taylor

The Ben Is Back star had her fame awakening after returning home to Georgia to visit her mother and younger sister. 

The three caught a movie and Julia stopped by the bathroom afterward.

'It was after the movie was over and I was in the bathroom and there was a woman in the bathroom who said, "Hey, girl in stall number one, were you in Mystic Pizza?"' she said.

What a shock: the Ben Is Back star had her fame awakening after returning home to Georgia to visit her mother and younger sister; pictured at the Ben Is Back premiere in December

The pushy fan proceeded to slip something under the stall and asked the Mystic Pizza star to sign it.

''Uh, not right now,'' Julia said. 'And I thought, wait, this is different.'

In 1989, a year after Mystic Pizza's release, she would star in Steel Magnolias, which garnered her an Oscar nomination and cemented her status as Hollywood royalty.

A quick ascent: in 1989, a year after Mystic Pizza's release, Julia would star in Steel Magnolias, which garnered her an Oscar nomination and cemented her status as Hollywood royalty

It's not just regular fans who have become starstruck around the Notting Hill star.

Aquaman star Jason Momoa ran into Julia during a taping of The Late, Late Show With James Corden, which both were appearing on. 

The actor introduced his mother to the Ocean's 11 actress and gushed about meeting her on Instagram, including that the Momoas 'geeked out a lil.' 

Celebrity run-in: Aquaman star Jason Momoa ran into Julia during a taping of The Late, Late Show With James Corden, which both were appearing on

New friends: the actor introduced his mother to the Ocean's 11 actress and gushed about meeting her on Instagram, including that the Momoas 'geeked out a lil'