Falcons chief executive Chris Flannery said Learoyd-Lahrs and utility Slade Griffin would play for the Coast against Easts Tigers at the Kawana Sports Precinct.
The trial match is the last hitout before the Intrust Super Cup season-opener against Norths Devils at Sunshine Coast Stadium on March 7.
Learoyd-Lahrs and Griffin will be the first Melbourne players to represent the Coast under a feeder agreement between the two clubs.
Under the three-year agreement, signed late last season, Melbourne squad members who do not make the NRL side will play for the Coast.
Melbourne also sends players to Easts, which has played in back-to-back grand finals.
The Storm has not revealed which players will be allocated to the Coast, but Flannery has been lobbying for experienced prop Learoyd-Lahrs.
The New South Welshman moved to Melbourne in the off-season after playing 109 games for Canberra.
Learoyd-Lahrs, 29, made four appearances for New South Wales between 2009-10 and four for Australia in 2010.
Versatile 24-year-old Griffin played 11 games for Melbourne in 2013.
- JOE FLYNN
Courtesy of Sunshine Coast Daily