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OTRC: Ryan Reynolds celebrates birthday weekend with Blake Lively

Ryan Reynolds and Blake Lively, who starred together in "Green Lantern," were photographed leaving a Boston apartment together early on Saturday morning, leading to reports that the two are officially dating.

Reynolds turns 35 on Sunday and a source told People magazine that it's no coincidence that Lively is in town for the occasion, "They are very much a couple... They're really happy together."

Reynolds is in Boston filming the action movie "R.I.P.D.," a Dark Horse comic book adaptation, which follows an undead police team. Meanwhile, Lively is based in New York, where she stars in the CW series "Gossip Girl."

The amorous pair was first spotted earlier in the month in Beantown, exchanging some public displays of affection while waiting for a train. A source told E! News that Reynolds and Lively, 24, were kissing and "all over each other" until the "Gossip Girl" actress boarded a train back to New York.

Lively returned to the city to continue filming her CW series, which began its fifth season on September 26. Reynolds stayed in Boston, where he is currently filming "R.I.P.D."

Reynolds and Lively's representatives had no immediate comment on the report.

It was recently announced that Lively had split from Leonardo DiCaprio after about five months of dating. The two have not commented publicly. Us Weekly magazine quoted their representatives as saying the actors "remain friends." A source close to the matter confirmed the split to OnTheRedCarpet.com on Tuesday, October 4.

DiCaprio, 36, and Lively were first photographed together in May on a yacht during the 2011 Cannes Film Festival in France, days after it was reported the actor and on-and-off girlfriend, Israeli supermodel Bar Refaeli, had broken up.

Lively has been previously linked to actor Kelly Blatz and "Gossip Girl" co-star Penn Badgley. The two broke up in September 2010 after dating for about three years.

Reynolds, who was deemed "Sexiest Man Alive of 2010" by People magazine, and Scarlett Johansson, 26, finalized their divorce in early July. They announced in December that they would end their 2-year marriage.

Following her split from Reynolds, Johansson was frequently seen with actor Sean Penn. The two never confirmed a relationship but were photographed together in public and also attended Reese Witherspoon's wedding. In early June, it was reported that Johansson and Penn had split.

Reynolds and Johansson appear to remain on friendly terms. People magazine reported that Reynolds and Johansson dined together on July 9.

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