Keanu Reeves arrives in Germany with girlfriend Alexandra Grant for 'Matrix 4' filming

Keanu Reeves was the picture of happiness as he was joined by his girlfriend, Alexandra Grant, ahead of filming for Matrix 4.

The actor arrived in Germany with his co-stars, Neil Patrick Harris and Carrie-Ann Moss, and last week, he was spotted laughing with Grant at Schönefeld Airport, in Berlin.

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The 55-year-old caused a social media storm back in November after stepping out publicly for the first time with Grant - something that he hasn't done in decades. Reeves attended the LACMA Art + Film Gala Presented By Gucci in Los Angeles with the visual artist, and the pair were seen holding hands.

The famously private A-lister rarely speaks about his relationships, making this an unusual move. His last public girlfriend was actress Jennifer Syme, who gave birth to their daughter Ava Archer Syme-Reeves in 1999, who was sadly stillborn.

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Reeves and Grant have known each other for years, and collaborated on the Speed actor's art book back in 2011.

This comes after Reeves and Carrie-Anne Moss opened up about their decision to return to The Matrix franchise.

Watch the trailer for The Matrix below:

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In a recent interview with Empire magazine, Moss explained "I never thought that it would happen," detailing that "it was never on my radar at all. "When it was brought to me in the way that it was brought to me, with incredible depth and all of the integrity and artistry that you could imagine, I was like, ‘This is a gift.’ It was just very exciting."

"Lana Wachowski wrote a beautiful script and a wonderful story that resonated with me," Reeves corroborated. "That’s the only reason to do it. To work with her again is just amazing. It’s been really special, and the story has, I think, some meaningful things to say, and that we can take some nourishment from."

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Also returning to The Matrix 4 is the franchise's co-creator, Lana Wachowski. Per Indiewire, the script for the upcoming feature was co-written by Wachoswski, Aleksandar Hemon, and Cloud Atlas author, David Mitchell.