The pair were once close but...
Rumours abound that the pair have split as they haven’t been snapped together for a couple of months.
Catherine, 43, played the singer in spoof pop group Fake That, who had the real boy band – including Jason – appearing alongside them.
The comedienne – who is mum to Erin, 9 – reportedly started seeing Jason in the summer after she split from her stage manager partner Twig Clark, 38.
A spokesperson for Jason says: ‘We don’t comment on their private lives.’
Read more celebrity gossip in the latest issue of Now dated 20 February 2012 – out now!