The 25-year-old becomes Vincent Kompany's sixth summer signing but the way it was announced was far more memorable.
The 25-year-old has spent the last four seasons at Liege, making 123 appearances where he scored 12 goals in the process. He joins a Burnley side who are back in the Championship.
Speaking of Championships, Hollywood superstar and WWE legend The Rock is familiar with a few.
Back in 2003, The Rock decided it was time to dedicate himself to Hollywood full-time. Given he's been the highest grossing actor in Hollywood now in multiple years, it's fair to say his decision paid off.
But back in 2003, he was the biggest wrestler in the world. Fresh off finally beating Stone Cold Steve Austin at WrestleMania 19, The Rock was about to depart the company before WCW icon Goldberg's music hit for his big WWE debut.
Well, in Burnley's version of events, it wasn't Goldberg who entered the fray, it was Bastien.
Legendary announcer Jim Ross' "He's here! They can't believe it!" is just perfect.
Bastien, an Anderlecht academy product, moved to Italy to sign for Chievo Verona in 2016 and featured 35 times in Serie A, before returning to Belgium with Liege.
The midfielder actually played against Arsenal in the Europa League back in 2019.
Kompany took on the Clarets' hot seat earlier this summer and has a massive rebuilding job on his hands with many senior players leaving the club after their respective contracts expired.
On Bastien's signing, Kompany said: "Samuel is a great addition to our team. He is a high energy midfielder, who can link up play, works very hard and recovers the ball well.
"We are delighted to add Samuel to the group and look forward to welcoming him to our squad."