Ed Sheeran

Ed Sheeran performs onstage during the 2015 Billboard Music Awards at MGM Grand Garden Arena on May 17, 2015 in Las Vegas, Nevada. 

Kevin Mazur/BMA2015/WireImage

Ed Sheeran received an exciting package in the mail today: The "Don't" singer was given his Guinness World Records certificate for "the longest climb to No. 1 on the U.K. singles chart." He posted a picture of the award on Instagram but kept his pride low-key with a caption of: "That ain't too shit is it."

It took Sheeran 19 weeks to reach No. 1 with his hit single "Thinking Out Loud," between July 5, 2014 and November 8, 2014. The record was previously held by Celine Dion, who's single "Think Twice" took 13 long weeks to make it to No. 1 on the same chart.

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"Thinking Out Loud" also made history by spending an entire year in the U.K.'s top 40. On the Billboard Hot 100, the track came very close to No. 1, peaking at No. 2 for an incredible eight weeks. That marked the most weeks for a song to peak at the second position since 2004, when Mario Winans' "I Don't Wanna Know," featuring Enya and P. Diddy (as he was then billed), also spent eight frames at its highpoint.

Listen to the record-breaking song here:

--Additional reporting by Keith Caulfield