Livingston have signed former Motherwell defender Morgyn Neill and forward Moses Duckrell, who was previously with BK Sport in Sweden.
Scotland youth international Neill, 19, and Englishman Duckrell, 18, have agreed two-year contracts.
Livingston manager Mark Burchill told his club website: "Morgyn was the best central defender in League One when he went on loan to Ayr Utd last year.
"And, at only 19, he is a fantastic prospect."
Neill made seven appearances for Ayr after moving to Somerset Park for the second half of last season before being released by Well.
Duckrell, a product of Barnet's youth system, impressed on trial with Livingston in a 1-0 friendly defeat by Real Sociedad along with Neill.
"Moses is a very quick player who has bags of potential and we will work closely with him to get him ready to play in the first team," added Burchill.