I did some research and I found a channel4 blog where one of Nathalie Emmanuel's friends said,
"..expected her to be fantastic in hollyoaks but I was a bit suprised. Don't forget she is 17 and never done TV before- she is probably just adjusting to it.."
(
http://community.channel4.com/eve/forums/a/tpc /f/3210039863/m/6850017655)
But her brother in the show, 'Sonny' played by Devan Luke Anderson was in Kerching as Taj Lewis on a CBBC TV series. Maybe you could be relating her to someone off his show? Or either it's him you recognise? ..But I think I know what you mean; she's got a familiar face I'm sure. X