The 'Burn' hitmaker and the McBusted bassist, who are rumoured to be in a relationship, attended the Storm Models party to launch Red Bull Zero at London's Red Bull Studios, and were spotted deep in conversation.
However, Dougie - who recently insisted the pair are ''just friends'' - reportedly ''shrugged'' when asked about his relationship with Ellie at the Storm bash, before the pair made a low-key exit from the venue.
And though she was reluctant to be drawn on whether she is dating Dougie, Ellie was happy to share her excitement about tomorrow night's (19.02.14), BRIT Awards, where she will perform and is up for British Female Solo Artist and British Single of the Year.
She told BANG Showbiz: ''I've just come from BRITs rehearsals with other performers and it went really well, it's going to be a great show and I'm excited.
''I can't wait to take my mum to the ceremony but I still can't decide what to wear, it's a tough decision.''
Meanwhile, Matt Cardle was seen chatting with 'The Voice' star Bo Bruce and Fearne Cotton's fiance Jesse Wood was letting his hair down, while 'Made In Chelsea' star Jamie Laing also attended the event.
Other guests included Lydia Bright from 'The Only Way Is Essex', girl band Neon Jungle, Jamal Edwards, Zara Martin, and Jessie Ware, who was working in the studio on her new album with Julio Bashmore.
Ellie, 27, and Dougie, 26, were first romantically linked in December, when they were reported to have been seen ''holding hands'' and looking close at the Cosmopolitan Ultimate Women Of The Year Awards.
Last week, they were also seen with their arms around one another at one of Taylor Swift's London gigs - where Ellie joined the star on stage for a guest appearance.
He also slapped a jet-lagged Taylor Hawkins.
The acclaimed performer had just cancelled touring due to a battle with cancer.