Even though the 39-year-old actor created his account nearly 59 weeks ago on July 27, 2015, he made it public on Thursday.
Bloom posted a photo of a piece of paper that read "I Caved..."
He made his romance with girlfriend Katy Perry Instagram official by sharing a video of the couple at Burning Man.
Back in May, Perry posted her first Instagram with Bloom while enjoying the amfAR Cannes Cinema Against AIDS gala festivities.
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