was reportedly asked for a photo by an unlikely fan at the on Thursday, former Prime Minister .
The former star, 45, star was said to have been 'honoured' by the request, before the pair went on to 'chat politics' in the VIP stands.
Cameron, 59, who , was joined at the races by wife Samantha, 54, who also posed for the snap.
It was a great day for Gemma who not only was £20,000, £5,00 of which was from one £500 bet alone.
Taking to Instagram she captioned the post: 'Fabulous day with @ruthcotterr @paddypowerofficial and it was lovely to be In the Royal Box and have a good chat with @dwdcameron and his lovely wife we spoke politics and what we was going to bet on next'.
A source said: 'Gemma was honoured that David asked her for a picture.
Gemma Collins was reportedly asked for a photo by an unlikely fan at the Cheltenham Festival on Thursday, former PM David Cameron (L-R) Gemma, David, Samantha Cameron, Ruth Cotter
Going on to tell The Sun: 'They chatted about politics and her fondness of conservative leader .'
Daily Mail have contacted David Cameron and Gemma Collins' reps for comment.
Gemma left the whole room in stitches as she yelled 'I'm f***ing loaded!' during a sit down lunch after winning £20,000, adding: 'I’m coming home with 20 large ones.'
She pocked the hefty winnings during day three of the races, £5,00 of which was from one £500 bet alone.
The reality star punched the air with glee after her horse, Meetmebythesea, came first in the 2pm race with 9/1 odds.
Taking to her Instagram at the end of the day, the former star fanned herself with the wad of bank notes alongside the track Work B***h.
She penned: 'Absolutely had the best day ever I’ve been very lucky today ☘️☘️ @paddypowerofficial thank you for all the luck ☘️ I’ve absolutely smashed it out the park today with the horse picks'.
Joining a host of other stars on the day, Gemma arrived by helicopter and stood out wearing a plaid coat with brown furry sleeves and a silk headscarf.
She wore pink gloves and carried a large Mulberry Bayswater bag – and wore sunglasses, of course.
Gemma has signed up for I'm A Celeb All Stars series, filmed in South Africa last year, and admits she 'felt like Lara Croft' tackling the 'terrifying' trials.
She confessed that after over a decade of feeling like a 'black cloud' hung over her head following her onscreen meltdown in Australia, quitting the show over her fears in just three days, she has finally proven herself.
Speaking about her determination to move on from her 2014 experience, which turned Gemma into a meme and viral clip, she said at Monday's I'm A Celeb All Stars launch: 'Obviously, it didn't work out for me the first time around.
'When I got asked to do it again, I thought I had spent my whole life with this black cloud hanging over my head. I am older now, I just thought, I have to do this before whatever happens to me in my life, I must go back into that jungle. It was one regret I had. This was a total redemption from me.
'On a real one, I went in there as Gemma Collins and it's like the GC is the bravado and she'll have a laugh and whatever, but I was so stripped bare because I knew it was so disastrous the time before.'
It was a great day for Gemma who not only was approached the Camerons but also netted £20,000, £5,00 of which was from one £500 bet alone
Gemma has explained that, despite knowing what to expect from the show presented by Ant and Dec, the trials were even harder than when she first appeared on the program.
She almost quit before even getting on the plane, admitting that if it wasn't for her makeup artist, she may not have taken on the challenge.
She said: 'I got told I was going to a cocktail party so I had a full silk gown on and I turned the corner and you know what they're like, bless you, producers, they go to me "Gem, it's all good, you're going in, you're going to have a few drinks with everyone, it's like a welcome meeting" but honestly it was nothing like that.
'It's so surreal. Nothing can prepare you for what comes next. It was so much tougher than before.
'I was absolutely bricking it, and I was petrified. My makeup artist had to slap me at Heathrow airport because I sat there and said "I don't think I can go through with this." I was petrified but I took a deep breath and went in strong.'
But for Gemma, who expected the heights, bugs, trials, and camp conditions to be her biggest test, it was living without her beloved two dishwashers that proved the toughest challenge.
She said: 'The one thing that troubled me though was the copious amounts of washing up because I was on camp duty with Adam Thomas and it was a massive camp, I'm not going to lie, I have two dishwashers at home.
'It was all part of camp life, it really grounds you again going in there. It brings you back to simplicity; it breaks you in ways you have never been broken before. I left some trials broken with every inch of my life, I can't describe the pain I felt.'
