Jez Bedford and Theo Widdrington have both penned their first professional deals.
The duo were offered one-year contracts – with the club option of a further year – after graduating from Pompey’s academy.
The 18-year-olds are both midfielders, with Bedford hailing from Poole, while Widdrington lives in Eastbourne.
Academy manager Mark Kelly said: “Jez and Theo have performed well over the past year and deserve their deals – we look forward to seeing them continue to develop with Pompey.”