A-listers who have incredibly rare physical traits – including Ashton Kutcher

Ashton was born with webbed toes, and proudly showcased the anomaly on Friday Night with Jonathan Ross in 2008. "I have two toes that are connected, webbed," he explained. 

"They are just a little connected…I heard this one little kid who had webbed toes, and he thought he was abnormal, but then he saw that I have them too, and it confirmed that he is abnormal."

"I thought everyone's toes were like that," the That '70s Show star added. "You can actually cut it when you are born. People's toes are joined, then grow apart. Mine just didn't [grow] all the way."

Harry is the owner of supernumerary nipples, meaning that he has a total of four nipples on his chest, with the extra two sitting lower on his abdomen. 

The singer has joked about the abnormality in the past, and shared on BBC Radio 1 that it might be his "best trait".

"My worst trait is, I think I snore," he said. "Also, I quite like routine, so I don't know if I'm incredibly spontaneous because I quite like routine. Best trait, I don't really know. It's weird to pick a best trait. Shall we go with the nipples thing?"

Just like Harry, Lily was born with a supernumerary nipple. The 'Smile' singer's extra nipple sits under her left breast and "actually lactates", as she shared on Shopping with Keith Lemon.

The legendary M*A*S*H actor was born with the incredibly rare physical trait of brachydactyly, due to a congenital disorder called Poland syndrome. 

As such, the fingers on his left hand are significantly smaller than his right.

 Gary went to great lengths to hide the abnormality throughout his career, and would often keep his hand in his pocket or his lap while filming M*A*S*H.

"Of course, this defect affected me while I was growing up," Gary said in an interview. "I suppose when I was very young, I knew my disability would set me apart and make me special."

The comedian suffered from a birth defect known as clubfoot during his childhood, which occurs when a baby's foot or feet twist inward and downward. 

It is caused by tendons that are shorter or tighter than usual, and the condition required extensive surgery in the past.

"I had operations, but still, it's like, I'm in pain. I just walk around with, like, a toothache in my foot. It's a constant," Damon told CBS Sunday Morning of the condition.

While Kesha is no longer part of the club when it comes to celebrities with rare physical traits, she was born with a small tail, which had to be surgically removed when she was a baby.

"I had a tail when I was born. It was a tiny tail, about a quarter of an inch, then they chopped it off and stole my tail. That was when I was little. I'm really sad about that story," she told Heat.

The iconic actress has incredibly mesmerising eyes thanks to a condition known as heterochromia iridis, which can be caused by a genetic mutation, an uneven distribution of melanin, or an eye injury. 

As a result, the colour of her eyes does not match; instead, she has one brown eye and one green eye.

The British star was born with 12 fingers thanks to a condition known as polydactyly, and had the extra digits tied off when she was a baby. 

Gemma revealed on The Jonathan Ross Show that the scars left behind were extra sensitive as they still contained nerve endings.

"It's my little oddity that I'm really proud of," she later told Esquire magazine. "People are really interested but repulsed at the same time."

The Bollywood star also has polydactyly; only his extra thumb is still attached, unlike Gemma's. 

The anomaly was even written into his onscreen characters, and it is something that he is now proud of after being bullied as a child.

"Life was tough for me. When I was a kid, nobody played with me because they thought I looked ugly with my extra thumb. It pained me. So once I thought of getting it surgically removed," he told The Times of India. 

"But I didn't. Slowly, I realised that the exterior is not the criterion for love and success."

"I just noticed God gave me a piece of ugly to carry with me to remind myself and others of how beautiful our imperfections make us," he later wrote in a Facebook post.

"My thumb used to repel people in school. Today, I am posting it to millions like you, who I know are just like me. Beautifully imperfect. Thank you, God, for this wonderful life. Make your weaknesses your strength. Be proud. U are beautiful. Trust me."