Lena Dunham: Early starts make me sick

Lena Dunham used to vomit if she had to get up before 7am.

The 28-year-old star is best known for writing hit HBO show Girls, which she also appears in. Now she's a megastar, she has to spend a lot of time travelling to promote her work - which means a great deal of early starts.

"I felt toddler-ish - like an angry toddler," she laughed to BBC Radio 1 about her mood that morning.

"I don't do well in the morning, but my job often requires me to wake up very early. It used to be that every time I woke up before 7am, I vomited. But I'm better now."

Lena is currently in London, UK, to promote her new book Not That Kind of Girl. While over in the British capital she has been indulging her love of crumpets - a bread snack, eaten toasted and usually slathered in butter.

"I have a theory that butter is very healthy for you and one of the reasons so many people in Hollywood get divorces is because they're not allowing themselves [butter]," she laughed of her fondness for the calorific spread.

During her stay, Lena has also been bought some gay interest and women's interest books by her family and friends, who have been busy browsing London's stores.

The star spoke a little about the process of writing her novel.

"I wrote a few essays and decided it could be a book and then it was just forcing myself do it in my off hours; it took about two years to write," she said.

"Even though there's some serious stuff, I hoped it would be a joyful experience. Every time I make myself laugh writing, someone else says, 'I don't like that part.' Nothing I laugh at successfully makes it into anything. I have a good base of people who will be like: 'You can't do that.'"

She added that her boyfriend Jack Antonoff will always be honest when critiquing her work.