Argentina and Barca's all-time leading goalscorer to go with his five Ballons d'Or and other honours, Messi is perceived to be a shy character.
However, Pique – who is often outspoken – made a revelation about the Barcelona captain.
"Messi has very ironic humour, he's one of the biggest trolls [I know]," Pique said on Movistar+ show 'La Resistencia'.
Messi has enjoyed another fine season for LaLiga champion Barca as they prepare to return to action in LaLiga against Espanyol.
The 31 year-old has scored 39 goals in all competitions this season, including a league-high 29 ahead of Saturday's derby against Espanyol.