Liam Payne's girlfriend Kate praised by fans after sharing sweet tribute to Louis Tomlinson

Liam Payne's girlfriend Kate Cassidy has been praised by fans after sharing a sweet tribute to Louis Tomlinson.

The couple were pictured at the premiere of Tomlinson's new documentary All of Those Voices at Leicester Square last Thursday (16 March).

Payne, who shares son Bear with his ex-partner Cheryl Cole, was commended himself for offering support to his former One Direction bandmate.

And now fans are saying the same about Cassidy after she took to Instagram to pen some kind words for her partner's pal amid the release of his film.

Alongside a snap of the couple on the red carpet, the 23-year-old wrote: "What a crazy eye opening experience!

"It was so nice to meet you finally. I’m so glad I got to share those moments with you watching your best friend, even the tearful ones."

She added: "@louist91 well done on such a beautiful film that everybody will love."

Dozens of people have commented on the post, with one saying she's 'built for this'.

"You're so supportive. Love you so much," said another, while a third added, "I'm so proud of you. I love you, Your style is amazing."

Many also praised Cassidy and Payne for their growing relationship, having been first linked together back in October last year.

"Gorgeous couple," said one fan, with another writing, "You both looked stunning!"

Speaking of aesthetics, one of the talking points of the event was Payne as he appeared to be donning a strong new look.

Photos from the premiere show the 29-year-old with longer hair and more chiseled features.

Taking to Twitter, a number of fans speculated whether he's had cosmetic surgery, including buccal fat removal, which is all the range amongst celebrities right now.

As said by one user: "Liam Payne is the face of the buccal fat removal movement."

"Liam Payne has had a full face job, respect it," said another, while a third added, "Liam Payne getting buccal fat removal is sending me to the actual moon."

Not everyone was focused on whether or not Payne has gone under the knife, however, with many fans simply stating that he looks great.

"He looks so good," said one, with another adding, "Hate to admit but he looks… hot."

But the most important takeaway was the fact that the singer was there for his pal, something he expressed in a heartfelt tribute.

In an Instagram post after the premiere, he said: "Seeing the world through your eyes last night was the most beautiful thing to experience.

"My neck hurts from how much I'm looking up to you right now, you were already my friend and brother but getting to look through that window into your world and mind... just extends that respect I have for you."

He went on to say that Tomlinson helped him out of a dark place in his life and explained that he was 'part of a small group' that 'saved his life'.

"Thank you Louis and congratulations - you deserve all these moments, every sight you get to see, every cheer that you hear and all the love you are receiving from the world."