Vice President Biden on Thursday celebrated President Obama's 55th birthday with a touching note on Twitter.

"Happy 55th, Barack! A brother to me, a best friend forever," Biden tweeted, along with a photo of two friendship bracelets with the names "Joe" and "Barack."

Happy 55th, Barack! A brother to me, a best friend forever. pic.twitter.com/uNsxouTKOO — Vice President Biden (@VP) August 4, 2016

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The bracelets are a nod to a video Obama was featured in in June, where he listed a number of tasks "that are harder than registering to vote."

In the video, the president is seen making friendship bracelets.