Adam Levine and Fiancée Behati Prinsloo Make Red Carpet Appearance Together for Begin Again Premiere

Keira Knightley talked to E! News of her singing co-star and said Levine "was great and really supportive."

These two soon-to-be newlyweds are absolutely glowing!

Adam Levine and his model fiancée Behati Prinsloo stepped out together tonight for the red carpet premiere of his debut film Begin Again in New York City. The Maroon 5 frontman looked dapper in a clean-cut, no-tie gray suit (and his back-to-brown signature 'do!), while his ladylove flaunted some cleavage in a bright coral, sleeveless dress with a plunging neckline.

The engaged couple accessorized their already gorgeous look with a pair of ear-to-ear smiles.

The film tells the story of a chance encounter between a disgraced music-business executive (Mark Ruffalo) and a young singer-songwriter (Keira Knightley) new to Manhattan turns into a promising collaboration between the two talents.

E! News also caught up with Knightley at the premiere, who said that Levine, who plays her ex-boyfriend in the film, "was great and really supportive."

Her singing role is a little bit out of her comfort zone, but Keira's hubby, musician James Righton, gave his lady a boost of confidence. "He said, 'You will be great.' He was very encouraging. He has not seen it yet so tonight he will," Knightley tells us.

Begin Again hits theaters June 27.