It looks like the 'Absolutely Fabulous' star's latest character shares Patsy's love of a younger man, as Joanna and Leo puckered up on the set of 'The Wolf Of Wall Street'.
The stars - who are separated by a 28 year age gap - were seen enjoying the embrace as they filmed scenes in Prospect Park, Brooklyn yesterday.
And Joanna is just as keen on the 'Titanic' star as her character, as she has previously spoken of her 'secret crush' on Leo.
The film sees Leo team up with director Martin Scorsese for the fifth time as he plays real-life stockbroker Jordan Belfort, who was jailed for stock market manipulation.
Brad Pitt and Angelina Jolie - 12 years
It's easy to forget that there's quite a big gap in age between Brad and Ange, probably because he looks so much younger than his 46 years
Madonna and Jesus Luz - 28 years
The 10-year age gap with Guy Richie obviously wasn't enough for Madge, because her next flame was just 23 years old - while she was aged 51. It seemed like a fling at first, but they lasted a fair old while before splitting up in early 2010
Mariah Carey and Nick Cannon - 10 years
There's a decade in age between Mariah Carey and her hubby Nick Cannon, she's 39 and he's 29 - but that's not much of a gap at all by modern celeb standards
Michael Douglas and Catherine Zeta Jones - 25 years
Quarter of a century is a fair old age gap in anybody's book, but Mickey and Cath seem happy enough together - and she was comfortable enough with the reputation that their marriage earned her to mock it in Intolerable Cruelty
Rod Stewart and Penny Lancaster - 26 years
For years Rod was known as the oldest swinger in town, but Penny has firmly tamed his roving ways and he seems devoted to her
Ronnie Wood and Ekaterina Ivanova - 42 years
But just to prove that age-gap relationships don't always work out well, Ronnie Wood famously left wife Jo for Ekaterina Ivanova - who is a whopping 42 years his junior. They've long-since broken up, which left Ekaterina free to enter the Celebrity Big Brother house and flirt with Basshunter
Sam Taylor-Wood and Aaron Johnson - 23 years
Sam and Aaron are more than 20 years apart, but they haven't let the hefty age gap stop them getting engaged and conceiving a child together
Stephen Fry and Steven Webb - 27 years
Stephen Fry had just split up with his partner of 14 years Daniel Cohen when he apparently began consoling himself in the arms of a much younger beau. His rumoured love interest was 25-year-old Steven Webb
Tom Cruise and Katie Holmes - 16 years
Plenty of people have been cynical about TomKat's marriage, but we're not goiong to cast any aspersions. Our lawyers wouldn't let us anyway, but they seem happy enough together
Also on HuffPost: