The promising centre-back has extended his contract by a further year.
Having won the Ligue 1 trophy and Coupe de la Ligue in his first season in Paris, Marquinhos was linked with moves to United and Barcelona after his club partnered David Luiz with Thiago Silva in the centre of defence last summer, with the former Roma man himself confirming the interest in quotes in the Daily Star earlier in the season.
However, the 20-year-old has showcased his talent by claiming a role at right-back for PSG in recent months, and has now extended his contract until 2019.
The young defender was delighted with his new deal at the Ligue 1 giants, telling the club's website: "I'm very happy that the club is showing such confidence in me. It's a new stage of my life. The project here in Paris is magnificent, and life in Paris is wonderful.
"I'm very happy with everything that's happened in my life since signing here. Paris Saint-Germain have provided so much for me. I hope it continues for a long time to come."
This season has seen PSG struggle to replicate their Ligue 1 dominance for much of the campaign, with the Parisians just a point ahead of rivals Lyon, but they have managed to make an impact in the Champions League. The French champions knocked Premier League leaders Chelsea out earlier in the month, arguably their first genuine European scalp since Qatar Sports Investments bought into the club in 2011, and are now set to meet Barcelona in the quarter-finals.
Marquinhos has more than played his part in that run, and PSG's president Nasser Al Khelaifi went on to say: "Marquinhos represents the future of our club and this extension shows how strongly attached he is to Paris Saint-Germain.
"The biggest European clubs were interested in signing Marquinhos, so this contract extension further reinforces Paris Saint-Germain’s ambitious long-term project."