Rupert Grint smashes Sir David Attenborough’s Instagram world record

Rupert Grint (Tim Ireland/PA)

Rupert Grint has beaten Sir David Attenborough’s record for the fastest time to reach one million followers on Instagram, according to Guinness World Records.

The Harry Potter star, 32, debuted on the social media platform on November 10 and reached the milestone in four hours and one minute.