With more than three decades between them, it seemed rather an unlikely pairing.

And now Jessica Lowndes, 27, has admitted that despite her claims she is not, in fact, dating Saturday Night Live's Jon Lovitz, 58.

In a new Instagram video she asks fans: 'I know it's the last week of March, but is it too early to say April Fools?'

While the only answer is surely a resounding 'yes', the pair's publicity stunt has at least achieved their aim by getting Jessica's new music video in the headlines.

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'Easter with my bunny!' Jon Lovitz claimed he was Jessica Lowndes' secret 'Mr Big' on Instagram on Sunday; the two later admitted it was a publicity stunt

The big reveal: Jessica teased fans with a 'new man' on Friday when she shared a picture of an older man's hand on her inner thigh; she then shared multiple posts hinting at the identity of her secret lover

'I love a good prank so happy early April Fools,' Jessica explained in a statement.

The pair met when they guest starred together in an episode of Hawaii Five-O late last year.

And, Jessica explained, after they hit it off she recruited Lovitz to star in her new music video for her single Déjà Vu.

'I fell in love with his humor and comedy,' she explained, adding 'he was the first person to come to mind.'

Last week former 90210 star Jessica repeatedly posted messages claiming she had an older 'Mr Big', who she said was her 'sugar daddy'.

Teaser: 'The way to my heart... #meltingmoments #MyCandyManCan,' wrote the 27-year-old 90210 star

Engaged? Jessica confused fans on Friday when she posted a picture of a diamond sparkler; fans have speculated that she and Jon are working on a project together

The actress then claimed to have spent Easter with Lovitz, who revealed that he was her mystery 'lover' by sharing a selfie in a softtop car.

'Easter with my bunny,' wrote Jon, sharing a series of heart emojis. He then responded to some of these 'haters' by reposting their tweets.

While the pair seemed delighted with their stunt, fans had immediately questioned whether the two were actually a couple.

One person who wasn't convinced by the romance was model Chrissy Teigen, who wrote: 'I smell April fools on this lowndes/lovitz relationship but if I'm wrong whoops jk screw everyone f the haters do you, you two.

Have worked together: The pair guest starred together in Hawaii Five-O, filming an episode back in January

Not the first picture: The pair struck up a friendship back in January; they are seen snapping pictures of one another in the pool in Honolulu at the time

'All the smarties know to start f***in with people now for a successful April fool. Hell I started months ago.'

But while they may not have convinced everyone, the pair certainly hit upon a winning formula - one involving plenty of sultry Instagram shots of Jessica.

One video posted on Easter morning showed Jessica in bed.

'When bae films you waking up in the morning,' she wrote. 'TooOldToUseHashtags #MrBig'.

Her hair perfectly styled in soft waves, and her face made up, Jessica certainly didn't look like she'd been doing much sleeping, as she rolled around on the white sheets.

Suspiciously the sheets looked brand new - showing fold marks from the store.

Another image showed her perched on the same Pinterest-worthy bed, wrapped in a towel and wearing bunny ears.

'The way to my heart... #meltingmoments #MyCandyManCan,' she teased.

Previously Jessica had seemingly announced her engagement to her mystery guy by posting an uncaptioned shot of a diamond sparkler - although she did not wear any ring in her Easter messages, and made no further mention of marriage.

New love? 'When bae films you waking up in the morning,' Jessica wrote, as she shared an Instagram video

Working together? Fans have suggested Jessica and Jon may be teasing a new project

Insisting her account hadn't been hacked in a video post Friday morning, Jessica first introduced fans to a new man before revealing in a video that she was 'super excited' to be finally sharing a 'big secret'.

Her initial post showed a man's hand on her bare, upper thigh while she was behind the steering wheel and the banner on the post read: 'There's a new man in my life...'

She also revealed that he was something of a 'sugar daddy' when she rode around town in his Bentley convertible with a thumbs up and a love heart.

The actress also shared the proverb: 'Old cows like to eat young grass' and then wrote beside it: 'And I love me some old cows...'

Is she genuine? The actress shared the proverb: 'Old cows like to eat young grass' and then wrote beside it: 'And I love me some old cows...'

Love is like watching the sunset: Before sharing the engagement ring picture, Jessica proved that she was in a very romantic setting at sunset

Jessica, who originally found fame on the reboot of 90210 in 2008, has also been working on some new movie projects.

Next up, she stars in 2016 horror Becoming and also another thriller called Becoming. The brunette also starred in a Thanksgiving romantic short called Merry Matrimony at the end of last year.

Romantically speaking, Lovitz is far from being Jessica's usual type.

Jessica previously found romance with Scottish rugby hunk Tom Evans in 2013, who also famously dated British model Kelly Brook.

Meanwhile Jon was briefly linked to Janice Dickinson back in 2004.