Josh Radnor Josh Radnor

[SPOILER ALERT: The following story contains spoilers about Monday's Season 8 finale of How I Met Your Mother. Read at your own risk.]

How I Met Your Mother told us to "get ready for the mother of all secrets" on Monday's Season 8 finale and it was legendary. That's right: We finally met The Mother! So who is she?

The future Mrs. Mosby, or "The Girl with the Yellow Umbrella" as she is credited, is played by Tony-nominated Once actress Cristin Milioti.

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