Rihanna dating Ryan Phillippe?

Hollywood is abuzz with rumours the pair have been hooking up in secret

Could this be Hollywood’s hottest new couple? Earlier this week we heard whispers songstress Rihanna was dating actor Ryan Phillippe, and now an American magazine has revealed the pair have been dating in secret 'for months.'

PICS: RIHANNA’S GLITTERING BIRTHDAY BASH

According to Us, Rihanna and Ryan first hooked up back in December - after Rhi’s relationship with sports star Matt Kemp hit the rocks - but have been keeping their new relationship seriously quiet.

'They initially hooked up when things were strained with Matt Kemp,' one source revealed, adding they ‘spent the night together’ after a Gucci/Roc Nation event earlier this month.

Ryan – who was recently linked to Mamma Mia! star Amanda Seyfried, and has two children with ex-wife Reese Witherspoon – even made an appearance at Rihanna’s high profile 23rd birthday bash, where she reportedly welcomed him with a ‘huge hug.’ 

But despite being spotted together, the pair were giving nothing away.

'They hung out a bit, but were discreet. It is still very casual. Clearly they are keeping it on the downlow,' said the source.

Rihanna partied the night away with celebs including Beyonce, Jay-Z and P Diddyat the glittering Beverley Hills bash, held a private residence on Monday.

Is there any truth to the latest relationship rumours? Let us know your thoughts in the comments box below.

PICS: RIHANNA’S GLITTERING BIRTHDAY BASH

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