All Blacks wing Rene Ranger and South African centre Robert Ebersohn arrived in Montpellier on Monday to significantly boost the Top 14 club's ranks.
27-year-old Ranger, capped six times by New Zealand but who called time on his Test career to play for Montpellier, signed a two-year deal with the southern French side.
Ebersohn, 24, arrived earlier on Monday while lock Sitaleki Timani, 27, is set to join them after Australia's final tour match against Wales on November 30.
"The team is gelling, but from experience the good players easily integrate," said coach Fabien Galthie.
Ranger and Ebersohn could make their debuts for Montpellier, who are second in the table because of a poorer points difference than leaders Toulon, against defending champions Castres on November 23.