Model-turned-actress Cara Delevingne is said to be planning to get married to her partner and singer St Vincent.

According to a source, Delevingne proposed to Vincent by getting down on one knee at the top of the Eiffel Tower here, reports dailymail.co.uk.

`There are two lifts going up the tower and they were in the one ahead,` the source told The Sun newspaper.

`As my group got out of the lift I could see Cara on bended knee, clearly proposing to her girlfriend. It was really touching. Cara obviously likes to do things traditionally,` the source said.

The source added that it wasn't clear if Delevingne was joking or was serious.

St Vincent, whose real name is Annie Clarke, and Delevingne have been together since March 2015 and have made several public appearances together.