Jennifer Aniston and John Mayer Act Affectionately at His Birthday

Adding fuel to the speculation of a rekindled romance, Jennifer Aniston and John Mayer have been reported to act affectionately during his 31st birthday party, held at exclusive Beverly Hills cigar bar Grand Havana Room on Wednesday night, October 15. An onlooker who saw them during the bash testified both stars "seemed to be having a great time".

Aniston and Mayer reportedly spent their time hanging out on a private outdoor patio for several hours late in the evening. The singer was even seen affectionately stroking Aniston's hair. "They were sitting next to each other. They're a very good-looking couple and seemed happy together," the onlooker informed People.

Prior to the birthday party, Aniston attended another party which was held for pal David Arquette's new clothing line, called Propr. She and Mayer were joined by a group of friends at Grand Havana Room, a members-only restaurant and cigar club. The entourage stayed past midnight to ring in Mayer's birthday, which actually was on October 16.

Previously, Aniston and Mayer were seen reuniting in Boston on Friday, October 10 to attend a Ray LaMontagne concert before then having dinner with friends at Mantra restaurant. The next day, October 11, they jetted together to New York City and were seen having a dinner at the city's romantic eatery Il Mulino, where they dined on oysters, ravioli with mushrooms and black truffles and fish. "They looked like they were having a fantastic time," People magazine cited an onlooker as saying.

Despite the mounting reports on a possible rekindled romance, Aniston and Mayer have yet issued statement confirming the extent of their relationship.