Sean Bean
From Tolkien Gateway
English actor Sean Bean (born 1959) played Boromir in Peter Jackson's The Lord of the Rings film trilogy.
Bean had previously played Richard Sharpe in the well known British TV series Sharpe, based on Bernard Cornwell's novels about the Napoleonic Wars. Boromir's comment about the shards of Narsil in The Fellowship of the Ring ("Still sharp!") is a nod to that role.