Credit: Matt Prokop on Twitter Photo: Matt Prokop and Sarah Hyland

The list of Hollywood celebs troubled starlet Amanda Bynes hasn't called ugly grows smaller yet! She just used her go-to diss against Modern Family star Sarah Hyland.

Sarah's boyfriend, Matt Prokop, instigated the Twitter fight, though, beseeching Amanda to "look in a mirror," to "stop getting work done," and to "save what's left."

Amanda Bynes, worked up into a tizzy, tweeted back, "Your girlfriend has an ugly face like you."

OK, we'll stop transcribing and let you read the tweets straight from the source. Here's the whole chronology:

Credit: NY Daily News via AOL On Photo: Watch Amanda Bynes Get Arrested For Weed Possession (VIDEO)