Kevin Costner’s mystery dog-walking female companion has been unmasked as an Argentinian wildlife photographer 25 years his junior,  can reveal.

The former Yellowstone star, 69, was snapped taking his Labrador retriever out for a stroll last week in Aspen with 44-year-old Guadalupe Laiz, who has her own fine art gallery in the exclusive Colorado enclave.

The blonde animal lover, who moved from her native Buenos Aires to the US at the age of 20, has dedicated her life to documenting animals in Iceland and Africa, according to her portfolio.

She also appears to have developed a close relationship with the actor, who has been vacationing in the snowy ski resort town where he recently attended a dinner party hosted by billionaire Amazon founder Jeff Bezos.

Laiz’s social media post indicates their apparent closeness, with the photographer sharing a photo of the two on December 17 and joking that the Costner’s dog Bobby was now ‘besties’ with her Samoyed pup called 22.

A source told DailyMail.com: ‘Kevin felt very impressed by her work, and they had a nice time together’.

The photographer seems to be a fan of the actor, following him on Instagram, with the pair bonding over their joint love of conservation and protecting the environment.

She also shares Costner’s love for dogs, dedicating an Instagram account to her fluffy white pup.

Meanwhile, Costner is always supported on the set by his beloved one-year-old English Boxhead Lab, whom he adopted Christmas last year.

‘Bobby is with me always. He’s either at my feet, my bed, on the couch… just always by my side. He travels with me on set and on vacations when it’s appropriate and possible,’ Kevin gushed in his dog’s DOGUE cover story.

Both Kevin and Laiz were dressed for the ski town’s chilly temperature in black puffer coats, jeans, and sunglasses last week, photos published by DailyMail.com show.

The photographer’s most recent work is a dedication to the Horses of Iceland, with the second part retailing for $700.

Laiz, who appears to be single, recently invested in a second property in Colorado, dropping $2.85million on a one bedroom two-bathroom condo in Aspen.

She already owns a $1million two-bedroom home in Basalt but appears to be expanding her property empire.

Kevin finalized his divorce earlier this year from Christine Baumgartner after 18 years of marriage. They share joint custody of their three children.

Despite the messy public divorce, that saw Christine ask for $250,000 in child support – which Kevin argued she would use on plastic surgery – the two settled their split privately.

The sighting of Kevin with Laiz comes as his character John Dutton was shockingly killed off in during season 5B of Yellowstone.

He was killed in the first few minutes of the premiere, with the show wasting no time ending Costner’s run on the series.

The Bull Durham star had a falling out with series creator Taylor Sheridan and was long rumored to be leaving the series.

But it isn’t only Sheridan who Costner has issues with. He’s also reportedly feuding with his on-screen son, played by actor Luke Grimes.

The Dances with Wolves actor shared his thoughts on the episode with DailyMail.com, saying: ‘I’m not thinking about it, I don’t think I’ve given it any thoughts, we’ll just let it go.’

Kevin acrimoniously exited the show over scheduling conflicts with his Western movie franchise Horizon, burning bridges on his way out.

But the actor seems to be taking the departure well and was seen happily chatting to Yellowstone superfan J-Lo on Friday.

The 55-year-old singer is a self-confessed geek when it comes to the hit Western crime series, and was spotted enjoying drinks with Kevin at the bar at the iconic western apparel store Kemo Sabe.

Jennifer was spotted earlier in the evening as she and her child Emme, 16, went shopping while dressed in their most stylish western-wear looks.

She had been spotted in the celebrity destination city days earlier as she geared up to celebrate Christmas there with her close friends and family, including her mother Guadalupe and sister Lynda Lopez.

Getting to spend time the star of one of her favorite shows was likely a treat for Jennifer, but her adoration for the critically dismissed series was reported to have ‘disturbed’ her estranged husband Ben Affleck during their marriage.