Vanessa on Lindsay: "She's a Hard Worker"

(WireImage.com)

Amid rumors that Lindsay Lohan's six episode stint on Ugly Betty was cut down to just four due to tensions between Lohan and Betty star America Ferrera, another show castmate is stepping forward in defense of the Mean Girls star.

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Vanessa Williams tells ET that working with Lindsay was "great."  "She was a hard worker. She showed up on time and [in] the scenes I had with her, she was completely prepared," Williams said in an interview airing tonight.  "She was great with me."

Earlier today, reports hit the Internet that Lohan's wild antics – including trashing her dressing room and parading around the set with an entourage of people – were too much for her Ugly Betty castmate America Ferrera.

The NY Post reports that during filming of an episode, titled "Granny Pants,"  America's character attempts to pull down Linds' pants in public, but, a source tells the Post, "Lindsay wasn't wearing any underwear."

CLICK HERE for OK!'s Ultimate Lindsay Lohan Gallery!