It's the last thing she expected to hear when she turned up for an interview on CBS' The Late Late Show With James Corden on Tuesday night.
The host revealed his special nickname for Julia Roberts' husband Daniel Moder.
'I call him Big D**k,' James dead panned, talking about his manly appendage.
It all started out so calmly: Julia Roberts and Ben Schwartz shared the couch on The Late Late Show With James Corden on Tuesday night
And when a surprised Julia asked him how he knew, he replied: 'We hang out in the restroom a lot.'
James continued: 'I'm just immediately familiar with him for no reason whatsoever and I like the cat, I dig him, that's all I'm going to say.'
But it wasn't all he had to say.
Going down hill: The 39-year-old host revealed his nickname for Julia's husband, Daniel Moder, is Big D**k
Too much information: James also joked that Julia, 49, wasn't the only thing that he and Daniel had in common, insinuating that he was also well endowed
The 39-year-old host later joked that Julia, 49, wasn't the only thing that he and Daniel had in common, insinuating that he was also well endowed.
'My poor husband, he's not even here to defend himself,' Julia exclaimed as the audience chuckled.
Her bemused fellow guest Ben Schwartz joked: 'He's not here to defend himself but he has such a huge dick. Oh my God.'
No defense needed: When the actress tried to 'defend my poor husband' a bemused Ben joked, ''He's not here to defend himself but he has such a huge dick. Oh my God'
Getting giggles: The star hid her face in her hands as everyone dissolved into gales of laughter
The 36-year-old actor added that the star was going to go home and Daniel's 'going to be, like, why did you talk about my perfect penis?'
The threesome fell about laughing as Ben said: 'This can't be on TV can it?' and they giggled even more when James replied, 'yes it is.'
Meanwhile, the actress can next be seen on the big screen opposite Owen Wilson as the parents of a 10-year-old boy with a facial deformity in Wonder, due out on November 16.
The guy with the Big D**k: Julia and Dan laughed as they walked back to their car hand in hand after an event in Los Angeles in March