DJ Diplo's mother is planning on ''grilling'' Katy Perry about her relationship with her son.

The 'Roar' hitmaker and her musician friend - who were first linked at the Coachella Valley Music and Arts festival last month - are seeing one another and Barbara Pentz is excited to meet the star before their romance gets serious.

Talking to, she joked: ''He hasn't mentioned bringing her home to mama just yet. But I think he would before it gets serious.

''Of course, she's got to be grilled by the mum!''

Barbara admits Diplo - real name Thomas Pentz - hasn't confided in her about the budding relationship but insists he has told his dad and they celebrity couple are planning on taking it slow.

She revealed: ''He hasn't discussed it with me, but he did with his dad. ''He said 'we're just hanging out. We're just friends right now.'

''I don't think it's a big deal right now. I don't think they'll be wedding bells yet.

''They're both doing their own things right now and on opposite coasts. He doesn't seem to be making a big deal about it.''

She did wonder if the rumours were true when news about their romance first broke since the pair both like attention.

She explained: ''I wondered if it was a publicity stunt. It did occur to me. They both do like the cameras.''

Barbara definitely approves, she added: ''She seems like a lovely girl.''

Katy was previously married to Russell Brand and split from her last serious boyfriend John Mayer earlier this year after 18 months of dating. Diplo was in a relationship with M.I.A. between 2003 and 2008.