Arnold Schwarzenegger, 76, is seen for 1st time in MONTHS with girlfriend of 12 years Heather Milligan, 49, as they prove they are still going strong

Arnold Schwarzenegger has been seen for the first time in several months with his girlfriend, Heather Milligan, proving they are still going strong.

The two were seen side-by-side at the opening of the 8th Austrian World Summit on Thursday.

The summit was themed Be Useful: Tools for a Healthy Planet and was held at the Hofburg Palace in Vienna, Austria.

The annual climate conference Austrian World Summit is the centerpiece of the Schwarzenegger Climate Initiative.

Arnie, 76, and Heater, 49, have been dating for 12 years.

Arnold Schwarzenegger has been seen for the first time in several months with his girlfriend, Heather Milligan, proving they are still going strong

The two were seen side-by-side at the opening of the 8th Austrian World Summit on Thursday. The summit was themed Be Useful: Tools for a Healthy Planet and was held at the Hofburg Palace in Vienna, Austria

Heather had on pale denim double breasted suit with slacks and a white shirt as she held onto a beige Dior purse.

Arnold was sharp in a hunter green blazer with a blue shirt and khaki slacks.

The two posed side by side in front of a Be Useful poster.

They were joined by Austrian President Alexander Van der Bellen, US Senior Advisor for International Climate Policy John Podesta and the US ambassador to Austria Victoria Reggie Kennedy.

Arnold first met Heather in 2012 while he was recuperating from a shoulder injury.

'We have so many things in common,' he told People in 2023. 'I think the world of her. I love that she’s into working. She’s clearly independent. She just is driven as hell.'

He was first linked to the physical therapist in 2013 after he separated from his ex-wife Maria Shriver in 2011.

That year, the public learned that Arnold had fathered Joseph with his family's housekeeper, Mildred Baena.

The annual climate conference Austrian World Summit is the centerpiece of the Schwarzenegger Climate Initiative

Arnie, 76, and Heather, 49, who have been dating for 12 years, were also seen on June 19 in Austria

Mildred gave birth to her son Joseph on October 2, 1997, after an affair with Arnold that started in 1996.

Arnold was married to Maria at the time.

They welcomed four kids - daughters Katherine, 34, and Christina, 31, and sons Patrick, 30, and Christopher, 26 - before splitting in 2021.

The actor didn't connect the dots until Joseph grew older and started looking more like him.

While Mildred raised Joseph by herself, she sometimes brought him to the Schwarzenegger's home where she worked for 20 years before retiring in 2010.

In February Heather and Arnold looked happy. The action star teamed up with his physical therapist girlfriend to show fans tips and tricks on how to manage joint pain 

The Terminator star released the video for his The Pump Club exercise series, revealing that the most common question he receives pertains to knees

Later, Arnold called his infidelity in his marriage to Maria a 'major failure,' but said Joseph was the silver lining of the difficult situation.

In February Heather and Arnold looked happy.

The action star teamed up with his physical therapist girlfriend to show fans tips and tricks on how to manage joint pain.

The Terminator star released the latest video for his The Pump Club exercise series on Saturday, revealing that the most common question he receives pertains to knees.

'Well, join the club, I've been having knee problems my whole life,' he admitted to the camera, before adorably introducing his girlfriend.

Arnie's ex wife Maria Shriver is seen with Jane Fonda at The Alliance For Women In Media Foundation's 49th Annual Gracie Awards Gala at in Beverly Hills in late May

And here is Arnold's daughter Katherine, 34, with her husband Chris Pratt

'She's not only my girlfriend but a great, even the best, physical therapist in the world,' he gushed. 'I mean, that's actually how we met, when she fixed my shoulder.'

The duo then delved into a range of exercises and stretching techniques designed to alleviate knee issues before things turned a little flirty between the couple. 

Arnold hiked up his shorts for a more comfortable fit, revealing his sculpted thighs with a confident flash of muscle, causing Heather to exclaim, 'Oh... showing off your legs, that's impressive.'

The duo immediately refocused on their task, guiding fans on the proper execution of these beneficial activities.