Bridget Jones is back, and she's got a baby on board. Actress Renee Zellweger is reprising her role as the beloved rom-com heroine for the third installment of the film franchise with "Bridget Jones's Baby," in which Jones finds herself in quite the predicament- she's pregnant, but she's not sure who the father of her child is.

Zellweger premiered the trailer for her new film during her appearance on "The Ellen DeGeneres Show" on Wednesday, giving fans a first look at the upcoming movie. The clip opens with the doors of a beautiful church and the pews filled with guests. Jones (Zellweger) stands at the back of the room, prepared to walk down the aisle while dressed in a white gown with a matching long-sleeved bolero jacket and a wide smile.

But reality is, after all these years, Jones is still single. The trailer cuts to Jones sitting on her couch in the living room, her hair tossed up in a messy bun. Wearing pajamas, Jones blows out a single candle on a cupcake as Celine Dion's cover of the hit song "All By Myself" plays in the background- a song that holds a special place in the soundtrack of the "Bridge Jones" film franchise.

"Oh, screw off," Jones says as she shuts the stereo off from her couch with a remote control.

Jones is still moving on with her life, trying to keep up in a spin class and having fun at a concert, and she even makes eyes at English pop star Ed Sheeran, who has a cameo in a bar scene. She works as a producer of a news program, but her love life is still in shambles. She runs into her ex, Mark Darcy (played by Colin Firth), and they both order large drinks at the bar to deal with their awkward greeting.

But in true Jones fashion, she meets new suitor Jack Qwant (Patrick Dempsey) in the worst way possible- after she face plants in a puddle of mud. Qwant helps Jones to her feet, and they share a "Cinderella" moment together as he slips her shoe back on for her.

However, things get complicated when Jones takes a pregnancy test and the results come back positive. She forces a smile when her co-workers throw her a surprise party to congratulate her, even though she's slightly panicking. Her mother, Pamela, reacts with concern when she learns about her daughter's unfortunate situation.

"Oh no, Bridget," Pamela tells her daughter. "Who's the father? Is it Mark's?"

"There's at least a 50 percent chance," Bridget tells her mother.

"A 50 percent chance?" Pamela asks with a horrified look on her face. "Did you have a three-way?"

"Bridget Jones's Baby" is due for a September 2016 release. Watch the full trailer below.