- Rupert Grint
- 04:01:00 hour(s):minute(s):second(s)
- United Kingdom ()
The fastest time to reach one million followers on Instagram is 4 hr 01 min, and was achieved by Rupert Grint (UK), on 10 November 2020.
Harry Potter legend Rupert Grint joined Instagram, explaining that he was "only 10 years late". He made the social media debut by posting a photo of himself and his baby daughter Wednesday.