Amy Schumer shares shocking nude photo of John Cena in behind-the-scenes snap from Trainwreck

Amy Schumer dropped a NSFW behind-the-scenes snap of John Cena from the set of their 2015 film Trainwreck.  

The duo played love interests in the comedy film, and even had a hilarious sex scene  that saw Cena struggle to talk dirty to Schumer. 

Now Schumer, 44, has uploaded a shocking nude photo of Cena, 48, from the making of the movie. 

In the photo, Cena had just a towel wrapped around his nether regions as he posed with his hands on his hips alongside director Judd Apatow, who was standing in a similar manner.

The photo was one of many Schumer uploaded in honor of  Apatow's 58th birthday on Sunday. 'I love you @juddapatow happy birthday,' she captioned the post. 

But the one of Cena undoubtedly stood out amongst the otherwise tame photos.  

Amy Schumer dropped a shocking nude photo of John Cena from the set of their 2015 film Trainwreck

Amy Schumer dropped a shocking nude photo of John Cena from the set of their 2015 film Trainwreck

Cena played Steve, a gym bunny who dated Schumer's character in the movie

Cena played Steve, a gym bunny who dated Schumer's character in the movie 

Schumer wrote and acted in Trainwreck, which turned her into a movie star after she had already become a TV sensation on the sketch show Inside Amy Schumer.

She led the cast as hard-living columnist called Amy, while Cena played a gym bunny called Steven who dates her early in the movie.

In one of the film's many raunchy scenes, Amy and Steven are having sex when she asks him to 'mix it up a little bit' and 'talk dirty to me.'

Steven initially resists, knowing he is about to 'sound stupid,' but Amy prods him and he relents - with hilariously disastrous results.

He reaches for what he knows - fitness lingo - and starts promising to 'fill you with protein' and 'put my green drink in you.'

Steven becomes so desperate for something to say that he starts throwing out random phrases in Mandarin, which he has just started to learn.

He eventually launches into a story about how he once thought she looked 'like a dude' from behind, at which point - to her horror - he climaxes.

Schumer has raved about filming the sex scene with Cena, cheekily telling E! back in 2015: 'He's huge' and adding that people on set 'just gasped.'

Cena's character struggled to talk dirty to Schumer's role in one particularly memorable scene

Cena's character struggled to talk dirty to Schumer's role in one particularly memorable scene 

Schumer wrote and starred in the comedy film, which saw her fall in love with a doctor after a history of casual flings

Schumer wrote and starred in the comedy film, which saw her fall in love with a doctor after a history of casual flings

Schumer and her husband Chris Fischer are rumored to be enduring marital woes

Schumer and her husband Chris Fischer are rumored to be enduring marital woes 

The movie includes a moment where Steven emerges from the shower with a towel hanging over his handsomely endowed manhood.

Schumer however revealed that a prop phallus was used in the making of the scene, explaining: 'I think it was part of a broomstick.'

'Jimmy was our prop guy and he was whittling one day. I was like: "What you doing, Jimmy? What you working on?" He was like: "I'm making John's erection."'

Meanwhile, the latest post comes amid rumors Schumer is experiencing marital woes in her marriage with Chris Fischer. 

The couple tied the knot in 2018 and share son Gene, six.