An ugly fight has broken out on the Ugly Betty set.
On Thursday, reports surfaced that Lindsay Lohan was such a diva while filming her guest spot, America Ferrera lobbied to have her originally-scheduled six-episode-appearance cut to four.
But a source tells Usmagazine.com that it wasn't Lohan who was acting up.
"America couldn't handle Lindsay stealing her thunder," the source tells Us.
See photos of stars on set!
The New York Post quotes a production source who calls Lohan's appearance "a mess.
"Lindsay would show up every day with an entourage of people. She smoked 24/7, and after she left, they had to re-paint her dressing room it was such a mess," the source says.
One of Lohan's pals counters her dressing room was used by the cast of Fox's thriller, Fringe.
"So maybe they messed it up," the source says. "And an entourage? Yeah, she had her sober companion with her, as well as her manager, assistant and Samantha Ronson. Her publicist was there a couple of times. But so what?"
See what a body language expert has to say about Lindsay and Sam's relationship.
The New York Post also claims the 22-year-old would "obsessively cut pictures of herself out of the tabloids like she was creating some sort of scrapbook and refused to go on set until America was there - it was a power play."
Lohan accidentally flashed the cast too, the paper reports. For an episode entitled "Granny Pants," Lohan - who played Betty's high school enemy - was supposed to "de-pants" Ferrera. But the scene calls for Ferrera to turn the tables – and pull down Lohan's pants instead.
"Lindsay wasn't wearing any underwear," the Post's source claims.
Counters a Lohan Pal, "Bulls--t! Lindsay wears underwear all the time now. She was wearing a G-string. And it was America's fault.
"They were rehearsing the scene and America wasn't supposed to pull Lindsay's pants down - but she did," the source adds. "Lindsay was so embarrassed, she started crying."
Lohan's pal says it was Ferrera who made filming unbearable for Lohan.
"America was mean to Lindsay," the pal tells the Post. "Producers give her too much power. Lindsay didn't do the last two episodes because America didn't like her and got her kicked off."
Reps for both actresses are downplaying any drama.
"America is grateful to have had her on the show and thinks everyone should tune in to see how great the episodes are," Ferrera's rep told the Post.
Adds Lohan's rep: "Lindsay was scheduled for six episodes and is appearing in four, but had a lovely time."