J.K. Rowling took to Twitter on Thursday to shed a bit more light on changing Patronuses, which occurred once very noticeably during the Harry Potter series - when Tonks' Patronus changed, as noted by Snape in Harry Potter and the Half-Blood Prince.

Tonks' Patronus changed as a result of a huge emotional upheaval - in this case, her falling in love with Remus Lupin. Rowling stated the following:

.@tigs25 Your Patronus only changes if it's eternal love, unchanging - part of you forever.

— J.K. Rowling (@jk_rowling) May 21, 2015

Rowling and even Jason Isaacs commented on Harry Potter actor Matthew Lewis' upcoming photo spread for Attitude magazine, which is a bit more mature than what he's done in the past.

Well, well, well, @Mattdavelewis (cover of @AttitudeMag)... pic.twitter.com/B9oGah2T50

— SnitchSeeker.com (@SnitchSeeker) May 21, 2015

.@Mattdavelewis Not as bad as watching Dan in Equus, but close. Warn me next time, for God's sake. https://t.co/r8EUd1GKqT

— J.K. Rowling (@jk_rowling) May 21, 2015

.@Mattdavelewis I will always support you whatever you want to do, Matthew. Now go put some clothes on.

— J.K. Rowling (@jk_rowling) May 21, 2015

.@jasonsfolly @Mattdavelewis I wouldn't know. I hastily averted my eyes and read an article on Political Correctness to get over the shock.

— J.K. Rowling (@jk_rowling) May 21, 2015

More from Matt's shoot - which is slightly not safe for work - can be seen here.

Stormdancer

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FearlessLeader19

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🌺🌺🌺 I fall in love with boys I see on a TV screen.

The ones in books who are as perfect as they can be.🌺🌺🌺

hpluvr037

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Thanks, Kitakins <3

Stefan

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RandomRaven

BanaBatGirl

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yeah, there's one thing about me that you should know________________________________

__________________________________________that I can't help from speaking my mind

SlytherinSistah

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Expecto-Penguin

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