Lauren made his debut on 20 January 2007 against Charlton Athletic and was a regular at right back for the remainder of the 2006–07 season. In the 2007–08 season, he dropped to second choice right back due to Glen Johnson's impressive form. However, Lauren found first team opportunities due to his versatility and filled in at left back on many occasions and played regularly on the right of midfield during January 2008 while John Utaka was away at the African Cup of Nations. Lauren was part of Portsmouth's 2007–08 FA Cup-winning team. Despite not making the squad for the final he appeared in the earlier rounds. In June 2009, his contract ended and he was released from the club having made just one appearance all season, as a substitute in the 2008 FA Community Shield.