Jedward have sent a message to JK Rowling, telling the Harry Potter author that "It matters not what someone is born, but what they grow to be".

Rowling took issue earlier this year with a headline on an online article discussing "people who menstruate" and said: "I'm sure there used to be a word for those people. Someone help me out. Wumben? Wimpund? Woomud?"

Critics accused her of being transphobic, an allegation Rowling strongly denies. She responded by saying: "I respect every trans person's right to live any way that feels authentic and comfortable to them. I’d march with you if you were discriminated against on the basis of being trans." 

Several high-profile names spoke out against Rowling's comments, including Harry Potter stars Daniel Radcliffe, Emma Watson and Rupert Grint. 

The controversy was reignited this week when a Sunday Telegraph review of her latest book, Troubled Blood, said it featured a "transvestite serial killer".

Former X Factor stars Jedward, real names John and Edward Grimes, have now become the latest high profile figures to criticise Rowling for the comments, writing on Twitter: "#TransRightsAreHumanRights Understanding is the first step to acceptance @jk--rowling and only with acceptance can there be recovery.

"It matters not what someone is born, but what they grow to be!

"Every human life is worth the same, and worth saving!

"We couldn't be more proud of our fans! Over the years seeing the growth and development finding who they are and becoming their true authentic selves!

"We LOVE You #TransRightsAreHumanRights."

Robbie Coltrane, who played gamekeeper Hagrid in the Harry Potter films, has suggested people are too easily offended and said he does not find Rowling's views offensive.

He told the Radio Times: "I don't think what she said was offensive really. I don't know why but there's a whole Twitter generation of people who hang around waiting to be offended.

"They wouldn't have won the war, would they? That's me talking like a grumpy old man, but you just think, 'Oh, get over yourself. Wise up, stand up straight and carry on'."