Watch The Rembrandts Play the 'Friends' Theme Song At Central Perk

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Danny Wilde and Phil Solem of The Rembrandts attend the Central Perk Pop-Up Celebrating The 20th Anniversary Of "Friends" on September 16, 2014 in New York City.  

They're still there for you.

Ready to feel old? The 20th anniversary of the premiere of Friends is next week. 

As part of the celebration, a pop-up Central Perk coffee shop, full of memorabilia from the show, is in New York City for the next month. On Tuesday night, the shop had a few very special visitors: The Rembrandts, who obviously performed the show's iconic theme song.

Watch a clip of the band singing "I'll Be There For You" -- sadly, without the colorful umbrellas. (Buzzfeed has full video of the performance.)

But the Rembrandts weren't the only special visitors: James Michael Tyler, who played Central Perk manager Gunther, was also on hand to team up with the band for a very special version of "Smelly Cat." Could this be more perfect?

The Central Perk pop-up shop is in New York City until Oct. 18.