Osama Krayem, 23, was just 11 when he was featured in a documentary about successful integration into Swedish society.

One of the Brussels bombing terrorists starred in a Swedish documentary about Muslim integration, a Swedish newspaper revealed Friday - before becoming a jihadist nearly 10 years later.

Osama Krayem, 23, starred in the 2005 film when he was 11 about his successful integration into Malmo society.

The film, Without Borders — A Film About Sport And Integration, features the suspect describing how the Malmo soccer team helped him acclimate to life in Sweden - and, according to critics, illustrated “the essential role of sport for integration."

“Osama was sullen and stayed in the background," Christer Girke, marketing manager for the team, told the Aftonbladet newspaper. "But he was a good player and always one of the gang. There was never any problem with him.”

Krayem worked at the Malmo city council in 2013, but vanished one year later. Photos show him in Syria in 2015, where he became radicalized; he traveled back to Europe, disguised as a refugee, in September.

Salah Abdeslam, one of the masterminds behind the November 2015 Paris attacks, picked him up at a hotel in Ulm, Germany.

Large terror network

Prosecutors have already filed charges against four people believed to have been involved in the attacks last month, in which 32 people were killed and 270 wounded.

Several suspects in the group have already been definitively linked to the terror attacks in Paris in November which killed 130 people. The DNA of one of the Brussels bombers - Najim Laachraoui - was also found on bomb remnants from those attacks.

The link has raised serious questions about the handling of the threat; the suspects had already been subjects of a wide-scale, international investigation following the Paris attacks, and carried out the Brussels bombings despite a slew of arrests in the Paris case.