Cory Booker and Watch The Tax Collector OnlineBert became BFFs on The Mashable Showat SXSW -- and made it official with a glorious selfie.

The Sesame Streetmuppet and the uber popular U.S. senator hung out in Austin, Texas on Saturday and captured the blooming relationship in the only worthy way. It followed a deep discussion about sidekicks, head shaving and the meaning of freedom.

Booker didn't shy away from expressing his love for Bert, his idol since he was three years old. "Bert, what an honor, you have been in my life for a long time and I am grateful," he said, causing our old favorite muppet to blush.

We'd blush too, Bert.

ICYMI: @CoryBooker and Bert just took an epic selfie on 'The @mashable Show' at #SWSX pic.twitter.com/q8Ombhx1fK

— Mashable (@mashable) March 11, 2017

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For more beautiful moments like this, join us on "The Mashable Show" live on Twitter on March 12 at 1 p.m. EST.

The Mashable Show at SXSW 2017