The reason she is going for an indefinite hiatus is her music career with The Pretty Reckless which is taking off.
"Gossip Girl" star Taylor Momsen gets another backup from her co-star regarding the rumor that she is banned from the set due to unprofessionalism. Matthew Settle who plays her on-screen dad Rufus Humphrey revealed that Momsen is sidelined because she wants to concentrate on her band The Pretty Reckless.
"[Saying she's banned is] a severe way of putting it," Settle told ITV's This Morning. "I don't think she's been banned from the set, I think she's off doing her own thing, creating her own music - she's very good at music."
It was reported earlier this week that Momsen is benched for some episodes beginning the midseason finale on December 6. Although a regular, the 17-year-old has only appeared in a total of three episodes this season.