Tony Romo called it quits with Jessica Simpson the night before her 29th birthday, People.com reports.

“She is heartbroken,” says the source. “She loves Tony. But it’s been difficult lately. He’s busy with his career and she’s getting ready to shoot her show (The Price of Beauty). They decided to part ways.”

Speculation about the couple’s recent split arose when the Dallas Cowboys quarterback and 14 of his friends partied at Hollywood hotspot MyHouse on Friday night - Simpson’s 29th birthday - without the birthday girl.

This isn’t the first break-up for the couple, who began dating in 2007.

Romo reportedly dumped Simpson last May, but was able to patch things up in time to attend sister Ashlee Simpson’s wedding a few days later.

The couple’s split may be good news to Cowboys fans as Simpson, who wore a pink No. 9 jersey to games, was thought to be bad luck to Romo’s football performance. The singer was even nicknamed “Yoko Romo.”

Simpson is said to have planned a Barbie and Ken-themed birthday party for July 10, however no such event happened.

“Barbie party didn’t happen, but I turned 29 and feel like I am on top of the world yelling I LOVE GETTING OLDER!” she wrote on Twitter.

Although a suddenly single Simpson may be heartbroken, the singer is staying positive.

“Everyone needs to know that hope floats … grab the strings and pull it back to you,” she tweeted.

Simpson’s rep had no comment. Romo’s rep could not be reached for comment.

Jessica Simpson’s mother Tina has revealed that her daughter has secretly married her American football star boyfriend Tony Romo.

Jessica and her mother were leaving Los Angeles restaurant Chili’s when Tina revealed her daughter had secretly tied the knot for the second time, reports News.com.au.

When asked if Jessica was planning to marry Tony, Tina said: “Jessica is already married to Tony! What are you talking about?”

Jessica, who has been dating Romo since last November, said “Well I guess if my mom said it, it must be true!”

However, the Dallas Cowboys quarterback recently dismissed rumors of even an engagement.

Attending the Cosmopolitan Fun Fearless Male of the Year Awards, the 27-year-old said that the engagement reports are nothing but rumors.