Milo Ventimiglia and Sterling K. Brown Shared a 'Father-Son' Flub at Critics' Choice Awards

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This is pretty much the last thing you want to happen when presenting an award!

This Is Us co-stars Sterling K. Brown and Milo Ventimiglia had a bit of a panic at the Critics' Choice Awards on Sunday when the envelope for Best Actress in a Limited Series or TV Movie went inexplicably missing.

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EXCLUSIVE: Sterling K. Brown Reveals the Moment He Felt 'Accepted' in Hollywood

The actors -- who adorably called each other “dad” and “son” while walking on stage -- looked briefly perplexed and stalled for a moment while another card with the winner (Sarah Paulson) was rushed over.

Watch the endearing slip up below.

EXCLUSIVE: Sterling K. Brown Talks Emotional Storylines on 'This is Us': 'It's Been Strangely Therapeutic'

Meanwhile, ET spoke to Brown before on the red carpet about the moment he truly felt "accepted" in Hollywood.

Watch the video below to see what he said.

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