After completing the FreedomPay 5K at Lincoln Financial Field on Saturday morning, Chelsea Trewella was approached by a member of the Eagles' social media team to do a testimonial about why she was supporting the 9th annual Eagles Autism Challenge.

Trewella thought maybe it was a surprise, and she'd be the winner of free Eagles tickets or something along those lines.

She was right about the surprise, but not quite on the prize.

While being "interviewed," the digital billboard in Pepsi Plaza switched over to a graphic that read, "Chelsea, will you be my forever Eagles fan?"

When Trewella was told that her boyfriend, Andrew Sulkowski, had a question he wanted to ask, she turned around and took a step back in disbelief as Sulkowski got down on his right knee, asking Trewella for her hand in marriage.

Saturday's Eagles Autism Challenge raised more than $16 million for innovative research and care programs. It also provided the background for a successful proposal.

"Very surprised," Trewella said. "I had no idea. I feel like I'm typically good at figuring out surprises. I thought he was just being nervous about the race."

The couple from South Jersey has been dating for nearly 2 years. They met in a gym, as Sulkowski complimented Trewella on her tattoos. They hit it off instantly. He knew she was "the one" early on.

Both are "massive" Eagles fans. Sulkowski has several Eagles tattoos and the two plan their schedule to ensure that they're watching the games together in the fall. When they registered for this year's Eagles Autism Challenge, Sulkowski thought it was the "perfect opportunity to do it at the Linc." He reached out to the Eagles Autism Foundation team over a month ago, and the Eagles' social media team was looped in to coordinate the logistics.

At the start line, Sulkowski spotted the Eagles' social media team and exchanged a head nod to acknowledge the connection. He ran the entire 5K with the ring in a zippered pocket, patting his hand to make sure it was there every quarter mile or so.

"This is expensive. I didn't want to lose it," he joked. "I kept my cool because I couldn't act any different. I was fine, really. I was totally normal."

Once they crossed the finish line, the Eagles' social media team located the lovebirds and the plan was put into action, ending with a resounding, celebratory yes in front of a growing crowd that realized what was taking place!

"It was executed perfectly. It couldn't have been any better," Sulkowski said.

There is no word as to whether the wedding will take place at next year's Eagles Autism Challenge.