Since the moment they met at age five, Rosie (Lily Collins) and Alex (Sam Claflin) have been best friends, facing the highs and lows of growing up.

A fleeting shared moment, one missed opportunity, and the decisions that follow, send their lives in completely different directions. As each navigates the complexities of life, love, and everything in between, they always find their way back to each other; but is it just friendship or something else?

Based on Cecelia Ahern’s bestselling novel, “Where Rainbows End,” “Love, Rosie” is a heart-warming modern comedy-of-errors posing the ultimate question: do we really only get one shot at love?

“I just fell in love with it right away,” said leading actress Lilly Collins of the “Love, Rosie” screenplay and her decision to take on the project. “After reading it, I just couldn’t imagine myself not playing the part.”

Daughter of international performer Phil Collins, Lily Collins continues to be a rising star in Hollywood. Collins made her feature film debut alongside Sandra Bullock in the 2010 Oscar nominated film, “The Blind Side.” In the short time since, she’s filmed “Mirror Mirror” with Julia Roberts and another bestselling novel adapted film, “The Mortal Instruments: City of Bones.”

“I think everyone has a little bit of Rosie in them and I know I certainly do,” Collins continues. “She’s charismatic, shy at times, but determined. She’s thrown into these situations that a normal teenage girl could be thrown into, but she doesn’t let anything deter her from reaching her goals.”

For her co-star, Sam Claflin, the prospect of filming “Love,Rosie” resonated on many levels. Initially attracted by the script and the prospect of working with Lily Collins, he was also a fan of the genre itself and saw the film as a departure from his previous work.

“Lily’s a diamond,” Claflin said, who plays Rosie’s unattainable love, Alex, on screen. “It worked so well because we got to know each other so well.”

It was initial television roles in the U.K. that caught Hollywood’s attention, seemingly overnight, and brought Claflin over to the U.S. In short order, Claflin was cast as ‘Phillip Swift’ in “Pirates of the Caribbean: On Stranger Tides,” and most recently ‘Finnick Odair’ in “The Hunger Games” series.

“I’d read a fair number of scripts over the past few years and nothing really grabbed my attention like this did,” Claflin said. “The journey that these two characters go on struck a chord with me. I also wanted to do something contemporary, something modern. All in all, it was a no-brainer.”

The films paints a rich and textured canvas of a complicated yet lifelong bond between Rosie and Alex, beginning in their childhood, spanning a trans-Atlantic separation, and enduring ups and downs of romantic liaisons with everyone but each other resulting in some bittersweet consequences.

“Love, Rosie” is released in select theaters and is rated R.

Rating: 4 stars out of 5.