The Hulu series "How I Met Your Father" stars Hilary Duff as Sophie Tompkins, who has had several love interests on the show.

Hilary has expressed interest in having Harry Styles play her next romantic partner.

The show's main mystery is the identity of the father of Sophie's son.

The cast is kept in the dark about the father's identity.

The series is told from the perspective of older Sophie, played by Kim Cattrall.

The cast has stopped guessing about the father's identity.

Original "How I Met Your Mother" star Jason Segel has expressed interest in appearing on the show.

Other former "How I Met Your Mother" stars have also made cameos on the show.

New episodes of "How I Met Your Father" air on Tuesdays on Hulu.