Has one brother and three sisters.
On his audition tape for Harry Potter, he performed hip-hop lyrics that he wrote to promote himself for the role of Ron Weasley.
Loving the Harry Potter series, Rupert Grint found out that there were auditions for the feature film, so he got the part although he had previously only acted in one school play.
Siblings are: James (b. 1990); Georgina (b. 1993); Samantha (b. 1996); and Charlotte (b. 1998).
Says he would like to be invisible so he could sneak out of detention at school
Has arachnophobia and, as of 2010, has still not watched the whole, completed Aragog scene from Harry Potter and the Chamber of Secrets (2002).
Plays the guitar a little bit and also plays the didgeridoo.
He attended an all boys-school in his hometown.
He likes all kinds of music, but his favorite is classic rock and roll.
His favorite actor is Jim Carrey. He likes movies like Shrek (2001), Ace Ventura: Pet Detective (1994), How the Grinch Stole Christmas (2000), and Dumb and Dumber (1994).
Neglected to write the essay describing Ron Weasley for director Alfonso Cuarón, reasoning "that's what Ron would have done.".
Took GCSEs at Richard Hale School, Hertford.
After taking his GCSE exams in May/June 2004, he chose to finish school at the age of sixteen to focus on his role in the Harry Potter films.
Can ride a unicycle.
He had a role in A Cinderella Story (2004) but was forced to drop so he can be committed to Harry Potter and the Prisoner of Azkaban (2004).
Bought a quad bike with his Harry Potter and the Sorcerer's Stone (2001) earnings.
He and his "Harry Potter" co-stars Daniel Radcliffe and Emma Watson were named #9 on Entertainment Weekly's Best Entertainers of the Year, 2005.
In an interview in 2001 on Nickelodeon with Emma Watson and Daniel Radcliffe, he stated his favorite show was SpongeBob SquarePants (1999).
Passed his driving test in the fall of 2006 after two attempts.
Attended Top Hat Stage & Screen School in Hertford.
Has 2 dogs, Ruby (a black lab) and Fudge (a chocolate lab).
His father once ran a Motor Car Racing Memorabilia Company.
Was ranked #16 on Forbes List of The 20 Top-Earning Young Superstars.(2007).
One of his favorite bands is the Arctic Monkeys.
On an on-line poll for Popstar Magazine in 2007, he was ranked the number one international celebrity.
Emma Roberts and Alexa PenaVega list him as their favorite actor.
Radio One's movie critic James King named "Ron Weasley" and "Hermione Granger", played by Rupert Grint and Emma Watson, as number 4 in his Top 5 Movie Couples list on Edith Bowman show.
Was considered one of the 55 faces of the future by Nylon Magazine's Young Hollywood Issue.
After the immense success of the Harry Potter movies, the actor was able to fulfill a childhood fantasy of, not just driving an ice cream van, but actually owning one. According to friend Emma Watson, Grint bought a fully equipped van with all the traditional accoutrements (interview: Late Night with Conan O'Brien: Episode #14.178 (2007)).
Close friend of his Harry Potter co-star Tom Felton.
Used to live in Cheryl Cole's old house in the Hertfordshire countryside.
Currently filming the movie Driving Lessons (2006) co-starring fellow "Harry Potter" star 'Julie Walters (I)'. [June 2005]
Currently filming Harry Potter and the Half-Blood Prince (2009). [October 2007]
Filming Cherrybomb (2009). [August 2008]
Filming Harry Potter and the Order of the Phoenix (2007). [February 2006]
Filming Wild Target (2010) with Emily Blunt and Bill Nighy. [September 2008]
Filming Harry Potter and the Deathly Hallows: Part 1 (2010). 
Filming Harry Potter and the Goblet of Fire (2005). [April 2004]
Skjåk, Oppland, Norway: Filming Norwegian movie Into the White (2012). [March 2011]
Is a supporter of English football team Tottenham Hotspur.
He is of English and 1/8th Irish ancestry.
Rupert's arachnophobia is so severe, he still hasn't been able to bring himself to watch the scenes from Harry Potter and the Chamber of Secrets which he shared with Aragog, an acromantula (giant spider) in the film, even though the spider is completely rendered in CGI. In fact, Grint's look of extreme fright and discomfort in those scenes wasn't from acting, that was his arachnophobia manifesting from the mere thought of there being a spider nearby, especially a giant one like Aragog.