Olympic star Oscar Pistorius is on trial for allegedly murdering his girlfriend – but that hasn’t stopped South Africa’s infamous “Blade Runner” from finding a new 19-year-old sweetheart!

Incredibly, The ENQUIRER has learned the teen beauty’s family approves of the relationship.

The 27-year-old double amputee, who gained international fame after competing in the London 2012 Olympics on prosthetic legs, met his new squeeze, Leah Skye Malan, in December.

Pistorius was free on bail after being charged with murdering model Reeva Steenkamp on Valentine’s Day last year. But Leah, a University of Johannesburg paramedic student, doesn’t seem fazed by the scandal.

“She’s helped support him through this difficult time and has introduced him to all her family,” said a source. “They have embraced him.”

Sources say Pistorius spends a lot of time at Leah’s apartment, and on weekends the two often visit her parents, Beverley-Ann and Andre, at their small farm in Potchefstoom, about two hours from Johannesburg.

“Leah’s parents, especially her dad, treat Oscar like a son,” the friend continued. “He’s able to relax in their company and be himself.”

That might seem unnerving to some, considering that Pistorius admits shooting Reeva to death through the bathroom door in his bedroom, claiming to have mistaken her for an intruder. And, ominously, just three weeks earlier, Reeva had sent him text messages saying she was afraid of him.

“To be Oscar’s girlfriend after what happened is like playing Russian roulette with five of the six chambers loaded,” said an insider.

“I don’t know how Leah can get a good night’s sleep under the same roof with Oscar.”