Today's episode of Ellen DeGeneres' hit talk show is going to be one for the Tumblr history books. Why, you ask? Because it's the day she interviewed YouTube sensation Tyler Oakley for the first time.

Tyler's is famous for being a super huge Ellen fangirl. And here's proof Tyler has ALWAYS been an Ellen stan, and that they've totes already met a bunch of times.

He helped Oprah interview Ellen when she came out.

He officiated Ellen and then-fiance Portia de Rossi's wedding.

He joined Ellen's character Dory in the iconic Disney/Pixar movie Finding Nemo.

He inserted himself into hot UK boy band One Direction just so he could see Ellen up close.

He was the Elphaba to her Glinda at the 2014 Oscars.

And speaking of the Oscars, he photobombed Ellen's celeb-packed selfie to end all selfies.

Tyler, you're so dedicated. Teach us your ways. 

What are some of your fav Tyllen moments? Let us know in the comments and on Twitter!

Watch Tyler and Ellen's amazing interview in the video below.