Rumors of Rihanna dating Oscar-nominated actor Leonardo DiCaprio have been doing the rounds for many months now. However, Rihanna's birthday bash on Feb. 20 further stoked the embers of speculations around their alleged relationship as the couple were seen engaging in generous amounts of PDA.

Mail Online reports that the 27-year-old Barbadian singer didn't let the 40-year-old "Titanic" star out of her sight. Add to this the fact that Leo was the one who organized her birthday bash at a plush Beverly Hills home. Eyewitnesses at the party claim that the pair were getting comfortable together and photographs of the lovebirds are circulating on several websites.

However, eyewitnesses also noticed that Rihanna seemed to be the clingy one in the duo, reports Perez Hilton. Leo was wearing a flat cap combo and had grown a scruffy beard while the "Umbrella" singer was seen in a white colored dress. While neither have confirmed nor denied the rumors, speculations started emerging when Rihanna and Leonardo were seen flirting at Harry Styles' birthday party in January 2015.

Rihanna's star-spangled bash included celebrities such as models Alicia Rountree and Angela Martini, Russell Simmons, singers Mick Jagger and Beyonce, and Paris and Nicky Hilton. The singer's other rumored flame, Richie Akiva, was also present.

Perez Hilton reports that Rihanna and Leonardo may not be exclusively dating each other but they are each other's first choice. Leo is famous for loving the ladies. He has dated and romanced a slew of models and is known to shy away from commitment. Some have even likened his ways to dashing George Clooney who was known to move from flame to flame before finally settling down with Human Rights lawyer Amal Alamuddin.

Whether Rihanna and Leo will last or even get serious remains to be seen. For now, it seems that they are enjoying each other's company.