'Avengers: Doomsday' star Simu Liu marries Allison Hsu. ‘Shang-Chi and The Legend of Ten Rings’ and ‘Avengers: Doomsday’ star Simu Liu married Allison Hsu in France, reports said. The couple began dating in 2022 and got engaged in 2025 when Liu proposed to Hsu during a Paris trip. Liu had arranged special video message from Taylor Swift for Hsu, who is her fan, as part of the proposal.