Rangers are close to signing Manchester United winger Amad Diallo on loan for the rest of the season.
Villa, European Cup winners in 1981-82 and Super Cup winners a year later, last reached the knockout stages of a European club competition in 2009.
Leicester City have been drawn to face Napoli in the Europa League group stage. The Foxes will also face Spartak Moscow and Legia Warsaw.
The 55-year-old signs a 12-month rolling contract, replacing the permanent void left by Neil Lennon's resignation in late February.
Rangers won the Scottish Premier League without losing a single game. Here we look at other notable teams who achieved a similar feat.
Rangers eased past Aberdeen to end the Scottish Premiership season unbeaten before lifting the title for the 55th time.
Former Liverpool player, Steven Gerrard, has been exceptional with Rangers this season, guiding them to their first Scottish League title in ten years.