Glasgow Warriors have signed Australian centre Sam Johnson and USA international lock Greg Peterson until May 2017.
Both players will sign two-year contracts with the Pro12 side, subject to visas and medicals.
Johnson, 21, will join from the Queensland Reds while Peterson, 24, arrives from Leicester Tigers.
"Both will be great additions to our squad next season," said Glasgow Warriors head coach Gregor Townsend.
Johnson played five matches for Queensland Country in Australia's National Rugby Championship and has made two Super Rugby appearances for the Reds.
He said: "Glasgow play free-flowing rugby and I really like the way they attack, which is a bit different to typical European teams and defensively their structure is second to none.
"I've been watching the European Rugby Champions Cup this season and I'm looking forward to having the opportunity to test myself at that level against some of the best teams in the world."
Three-times capped Peterson joined Leicester in December from Super Rugby side NSW Waratahs, making three appearances.
He said: "I worked alongside some very good second-rowers at the Waratahs such as Dean Mumm and Kane Douglas, who have excelled when they've moved to the northern hemisphere."
Townsend added: "Sam has played very well since his return from rugby league, producing some eye-catching games in the NRC and at club level.
"He has been a regular for the Reds' back-up side this season and his impressive performances have seen him break into the first team.
"He is a strong-running ball carrier that can cover both centre positions and we believe that he will continue to improve within our environment.
"He has a real physical presence and hits hard in the tackle. He will give us something different and add to the competition for places in the second-row."