Welcome to Miami, Bennifer 2.0!

On Sunday, May 23, Jennifer Lopez and Ben Affleck were photographed at a private residence in the Florida city, where she owns a different home, weeks after they rekindled their '00s romance. J.Lo was all smiles as she walked down a flight of stairs outside with the Oscar winner following close behind.

A source who witnessed their reunion tells E! News, "Ben took a red eye to Miami and went straight to J.Lo's new house in the early morning hours. She looked very happy to see him and they walked around the property together so she could show him around."

Adds the insider, "She had a big smile on her face and was twirling in a loose summer dress. They spent the day inside together but came out a few times for fresh air and to admire the water view."

While Ben smoked a cigarette, the source says Jen stepped out on the balcony to snap selfies.

Last week, the two were previously spotted together in Los Angeles, where they both have homes, a source close to Jennifer told E! News on Thursday, May 20. The insider said, "They were excited to reunite after being apart for a few days. She had a break in her work schedule and wanted to see him again."

The source continued, "It's all very new and exciting even though they have known each other forever. It's been fun to get to know each other all over again. They are both very happy with where things are and where they are going. She had to leave to go back to Miami for work, but they plan to see each other again soon."

In mid-April, J.Lo, 51, and Alex Rodriguez, 45, confirmed they had ended their engagement after a four-year relationship.

Later that month, Ben, 48, was spotted at Jennifer's mansion in Los Angeles. In early May, the two further fueled romance speculation when they vacationed for about a week together in Montana, where the Argo actor has a residence. It marked the first time the two were photographed together since they ended their own engagement in January 2004 after an almost two-year relationship.

Alex, a former New York Yankees star, seemed to throw some subtle shade at Bennifer's reconciliation earlier this month when asked about their reunion. When asked about it, he said, "Go Yankees!"

Earlier on Sunday, just before the photos of Jen and Ben in Miami were published, A-Rod posted on his Instagram Story, "I am about to step into a new beginning in my life," he began his caption. "Anything that doesn't serve me is clearing out of my life. New energy is emerging. New levels are unlocking for me mentally, physically, and spiritually."

He added, "I am remaining patient and know that this new phase of my life is coming."

After Jennifer and Ben were photographed in Montana, a separate source told E! News that Alex was "shocked that J.Lo has moved on."

And fans speculated that he has as well when an Australian TV host, Belinda Russell, announced last week that the retired MLB player DM'd her on Instagram to compliment her "great" feed of content. Alex's rep later said that it was his two daughters, Natasha, 16, and Ella, 13, who messaged her.