AceShowbiz -

Apparently, Jennifer Aniston and John Mayer are taking their much reported rekindled romance to great lengths as she was seen making an overnight visit to his L.A. home on Thursday night, October 16. The visit, the first ever that Aniston has ever made since she dated Mayer, might indicate that they're moving into the next level of their relationship.

Aniston, as reported by OK! magazine, arrived at Mayer's Pacific Palisades home casually dressed in jeans at around 9:30 P.M. PT. She was driven in the back of her security's car. When she was making her way out of the car and heading for the home, she was spotted carrying what looked like an overnight bag.

"Since they started dating, they always - ALWAYS - stayed at Jen's place," an insider revealed to OK! "John's home is your typical bachelor pad; it's run-down, overgrown with trees and needs a paint job. There's probably a moldy tuna fish sandwich and a six-pack of beer in the fridge. That's not exactly what Jen is used to."

On Wednesday night, October 15, Aniston was seen joining Mayer and a group of friends at exclusive Beverly Hills cigar bar Grand Havana Room for an early 31st birthday celebration for the singer. She and Mayer reportedly hung out on a private outdoor patio for several hours late in the evening. He was even seen affectionately stroking her hair. "They were sitting next to each other. They're a very good-looking couple and seemed happy together," a witness told People.

Both Aniston and Mayer are still keeping mum about their alleged rekindled romance.