Scroll down to see a trailer for the film...
Matching colours: Justin Bieber and girlfriend Selena Gomez colour co-ordinated in purple for the premiere of his new movie Justin Bieber: Never Say Never in Los Angeles last night
They were originally fairly coy about their blossoming romance but it appears that teen love birds Justin Bieber and Selena Gomez are hiding it no longer.
The 16-year-old pop star and the 18-year-old actress have been spotted getting cosy together on several occasions over the past couple of months but never admitted to a relationship.
However the young couple both made an appearance on the red carpet for Justin's new documentary film Justin Bieber: Never Say Never.
Glam girlfriend: Selena looked stunning in a bright purple cocktail dress and sparkly high heels as she waved and blew kisses at photographers
While they didn't pose together at the event at the Nokia Theatre in Downtown Los Angeles, they made a statement instead with their colour co-ordinated purple outfits which also matched the carpet.
Justin wore a purple velvet tuxedo jacket over a black shirt and black trousers which he teamed with trainers while Selena looked glamorous in a stunning short bright purple satin dress.
Bieber fever: The pint-sized pop star signs autographs for his adoring fans who arrived at the Nokia Theatre in Downtown Los Angeles
Here come the boys: Movie producer Usher with Bieber and his manager Scooter Braun in their 3D glasses
She paired the cocktail dress with sparkly heeled pumps and a small black clutch bag.
Just a couple of days ago the cute couple were spotted strolling hand in hand down the beach in Venice, California.
Apart from his rumoured new girlfriend the singer also drew in a star studded celebrity crowd for the premiere.
Family affair: Will Smith attended the event with his stylish looking family Jada, Jayden and Willow
Whip it: The siblings posed together in the super-cool outfits and right, Jaden and Will put on a loving display
Actor and rapper Will Smith brought his stylish family to watch the film and the smiling group posed up for pictures on the carpet.
Jayden, 12, and Willow, 10, both demonstrated their own fashion sense in trendy outfits - Jayden in a Michael Jackson inspired yellow leather jacket and Willow in a cream leather jumpsuit and multi string necklace.
R&B star Usher Raymond brought along his two sons from his ex-wife Tameka Foster - Usher Raymond Jr, aged three, and two-year-old Naviyd Ely Raymond, both of whom had matching hair cuts just like their daddy.
Walking the carpet: TV personalities Kendall and Kylie Jenner wore similar style dresses while Miley Cyrus played it casual in jeans and a tasselled, flowing jacket
Just like daddy: Usher brought along his children, two-year-old Naviyd Ely Raymond, left, and Usher Raymond Jr, aged three
Superstar power: Former Spice Girl Mel B brought her two daughters, Phoenix Chi and Angel and one of their friends, right, Glee star Jane Lynch brought her family to the premiere too
Glee star Jane Lynch also made it a family affair and came with her wife, Dr Lara Embry and two daughters.
Other celebrities in attendance included Leona Lewis, who donned a standout top complete with lips around the bust, Black Eyed Peas star Will.I.Am, singer Chris Brown and The Hills star Whitney Port.
British invasion: Jamie Oliver took wife Jools and daughters Poppy Honey and Daisy Boo to the screening
The star studded event was relatively low-key compared to the scenes in Bieber's native Toronto, Canada, where streets around the cinema came to a standstill.
Thousands of fans who were unable to get inside the overwhelmed venue threatened to start a riot and storm the theatre when they were denied entry.
His die-hard fans - 'Beliebers' - had camped outside overnight to catch a glimpse of their idol.
Getting lippy: Former X Factor winner Leona Lewis donned a wig and a standout top with giant lips covering her bust, seen right 90210 star Lori Loughlin
Bieber fans: Black Eyed Peas star will.i.am, singer Chris Brown and Hills star Whitney Port all came out to support the star
Never Say Never, which follows the teen star on his 2010 concert tour and features appearances by Usher, Miley Cyrus, Boys II Men, Sean Kingston and Jaden Smith, is released in the UK on February 18.
It is released in conjunction with his autobiography which is already available in store titled Justin Bieber: First Step 2 Forever.
In the spotlight: Justin walks the purple carpet, which matched his tuxedo jacket, before a frenzy of flashbulbs
Source:Dailymail
