Eva Mendes and Ryan Reynolds surprised an Australian family on Halloween

She’s currently the National McHappy Day Ambassador.

And Eva Mendes posed up a storm inside of McDonald’s Haberfield in Sydney‘s Inner West to meet with families staying at Ronald McDonald House in Westmead for McHappy Day on Saturday. 

The mother-of-two donned a $700 dress from Australian brand Oroton which came in white silk complete with flower stamp prints.

Eva Mendes posed up a storm inside of McDonald’s Haberfield in Sydney’s Inner West to meet with families staying at Ronald McDonald House in Westmead for McHappy Day on Saturday 

She paired the summery number with $1,995 Christian Louboutin printed leather platform sandals.

She recently revealed how she and long-term boyfriend Ryan Reynolds caught an Australian family hilarious off-guard when they took their kids trick or treating in Bondi on Halloween.

The Hollywood couple, who are currently living in Australia while Ryan films The Fall Guy, took their children Esmeralda Amada, eight, and Amada Lee, six, out in the eastern Sydney suburb to knock on doors and celebrate the American tradition last month.

But one Bondi dad didn’t recognise the stars – who were both in costume.

The mother-of-two opted for a $700 dress from Australian brand Oroton which came in white silk complete with flower stamp prints

‘We went to one house, they were out of candy and the dad answered,’ the Hitch star told News.com.au.

‘He was so sweet. He didn’t know who we were. Ryan had a mask on, I looked like I don’t even know what, I let my kids paint my face. And then he found candy for us, which was so sweet.’

As they left the house, the man’s daughter discovered who had just knocked on their door, and excitedly chased them down to get a picture. 

The glamorous Hollywood star was hard to miss inside of the fast food outlet 

‘As we’re walking down the street I see this like sweet, pretty lady running down with a bunch of kids behind her running,’ Mendes added.

‘She was like “I’m sorry this is so not Bondi but we have to get a picture”. She was like “It’s my daughter’s thirteenth birthday” so I said we’ve got to do it.

‘They were lovely, we spoke to them for a while and that was great. Everybody was so cool.’

Eva struck a hilarious pose by putting a donation bucket on her head to help raise awareness 

It comes as Eva told Daily Mail Australia that she, Ryan and their children have been exploring Sydney and fallen in love with the Northern Beaches, which are located about an hour from the city centre. 

‘My favourite thing is hard because there’s so many favourite things, but I’m gonna say the Northern Beaches,’ she said. 

While most tourists and visitors tend to prefer the Eastern Suburbs beaches, Eva and Ryan have grown fond of the picturesque coast up north.   

‘We just went up and explored some beaches. Pretty epic,’ she said. 

Eva wore red McDonald’s branded socks during a promotional appearance for the charity on Friday