Luton have made their ninth summer signing following the arrival of winger Danny Green.
Notts County have signed Togo international Mawouna Amevor on a two-year deal.
The 37-year-old, who has also featured for Newcastle and Sunderland in the north east, will go straight into Boro's squad for the clash with Bolton on Saturday.
The Republic of Ireland international has not featured for Villa since January.
Should he play at the weekend, it would be Given's 600th club game.