The German supermarket asked M&S to forget the ongoing beef surrounding Aldi's Cuthbert the Caterpillar cake and their own Colin the Caterpillar to come together and support a limited edition version of Cuthbert to raise money for cancer charities.
Aldi tweeted: "Hey @marksandspencer can Colin and Cuthbert be besties?
"We're bringing back a limited edition Cuthbert and want to donate profits to cancer charities including your partners @macmillancancer & ours @teenagecancer.
"Let's raise money for charity, not lawyers #caterpillarsforcancer."
Despite their good intentions here, it's unlikely that Marks & Spencer are going to let up, given that they've already got the lawyers involved.
However, M&S did respond to Aldi's offer by giving the supermarket an idea for a new cake based on its Kevin the Carrot character.
M&S claim that Aldi are infringing on their property by releasing their own version of the caterpillar confectionary, which has been on the market for about 30 years.
Despite that fact that many supermarkets have their own version, including Sainsbury's Wiggles, Tesco's Curly, Morris by Morrisons, the Co-op's Charlie, Cecil by Waitrose and Asda's Clyde, they have been particularly annoyed by Aldi's Cuthbert.
They want Aldi to take the cake off sale and agree never to sell anything similar again, and judging by the joking responses that Aldi has released on Twitter, it seems unlikely at this stage.
On their official account, they've been tweeting stuff like: "This is not just any court case, this is... #FreeCuthbert."
That's obviously a dig at the popular M&S campaign from a few years back.
They've even mocked up a fake bit of packaging for Cuthbert's cake box, in which the caterpillar is locked up behind bars and apparently 'serves 12 years'.
We definitely haven't heard the last of this larval litigation, that's for sure.
Joking aside, M&S have taken the matter to the High Court, arguing that customers could be led to believe that Aldi's product is of a similar standard to theirs, and that they are 'riding on the coat tails' of Colin's success.
A spokesperson said: "Because we know the M&S brand is special to our customers and they expect only the very best from us, love and care goes into every M&S product on our shelves.
"We want to protect Colin, Connie and our reputation for freshness, quality, innovation and value."
So far, outside of jokes online, Aldi has not commented in an official capacity.Featured Image Credit: Marks & Spencer