The latest Simpsons guest star might surprise you!

You really know you've made it when you get to guest star on The Simpsons, right?

Well, in that case, creator and star of hit show Girls, Lena Dunham, has well and truly hit the big time!

Yes, the fabulous Lena has been offered a guest appearance on the long-running show and has, unsurprisingly, jumped at the chance.

28-year-old Lena will play Candace, a pharmacist treating Homer for narcolepsy, who suddenly finds herself the object of his affections.

The show's executive producer, Al Jean, chatted about the exciting collaboration and revealed that while Lena won't be playing herself or Hanna, her character in Girls, we may be familiar with the type of character she will be voicing. 

He gave us an idea of what to expect, saying: "That funny, intellectual, slightly awkward, endearing tone that everybody's familiar with."

The unbelievably talented Lena will be starring in the premiere of the show's 27th season, in an episode called Every Man's Dream.

We can't wait!