Bradley Cooper and Renee ZellwegerBradley Cooper and Renee ZellwegerRenee Zellweger and Bradley Cooper's relationship is causing quite a stir.

They were on, then came rumours they had split, but it now looks like they could be back together.

And we are determined to get to the bottom of this mystery.

Try as they may to throw us off the scent, we can't be fooled.

Ok, well rarely anyway.

The couple were spotted flying in to Los Angeles from Vancouver, where Bradley is filming a remake of the iconic '80s TV series The A-Team.Bradley Cooper and Renee Zellweger Bradley and Renee in the summer

Arriving on the same flight, they left the plane separately and tried their hardest to go unnoticed in their dressed down casual attire.

But the glowing smiles on both their faces spoke volumes.

Going their separate ways, Bradley's beaming smile resembled that of a cheeky schoolboy with a big secret.

While Renee chose to cover her eyes with dark shades, preventing anyone from noticing where she was really looking.

They do make a cute couple so let's hope this romance still has plenty of mileage.

Take a look at out Splitsville gallery to see which couples didn't last.