Theyre cousins and they live together, but theyre really different, said Dunham.

So, it can be hard for them to co-exist together because they have very different interests.

You know, they have a connection, but Karen is into…she likes Chris Pine movies.

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Credit: NBC

Her favorite actor is Minka Kelly.

She loves Minka Kelly.

I like Minka Kelly too, but for her, its an obsession.

Or she readsUs Weeklyand she got this coat because Kate Hudson was wearing it.

As for little Miss Simmons, life isnt so easygoing.

Susan has a growth disorder, so while shes five days older than Karen, shell never get bigger.

And the other thing about Susan is shes very goth, shes very dark, shes very moody.

Shes only been off of heroin for four months.

Hear the full poem in the clip below.

The Tonight Show Starring Jimmy Fallonairs weeknights at 11:35 p.m.