Karl and Susan split last year after they were unable to move on from the disputes they had over the late Jim Dolan (Scott Parameter).
Speaking to Digital Spy, Lucas - who plays Summer Hoyland - admitted that she has not yet heard of any plans to bring the popular pair back together.
She explained: "There's nothing that I have heard of. But I personally hope they'll get back together, and I'm sure that they still love each other.
"Hopefully in the future they will be able to reunite."
Lucas added that she has learned a lot from working closely with Alan Fletcher and Jackie Woodburne, who play Karl and Susan.
"They're very supportive," she said. "I'm very, very lucky to be able to work alongside such talented and experienced actors.
"I couldn't ask for much more than that - they've been on the show for 17 years and they know the ins and outs of the industry and acting. They've been able to share a lot of that with me, so that's been really good."
Neighbours airs weekdays at 1.45pm and 5.30pm on Channel 5 in the UK and weekdays at 6.30pm on Eleven in Australia.
> Neighbours stars Jordy Lucas, Ashleigh Brewer moving in together
> Read Jordy's recent interview with Digital Spy
> Read more Neighbours news and spoilers