Springboks Siya Kolisi, Damian de Allende and Steven Kitshoff have all signed contracts to remain with the Stormers until the end of 2019.
Kitshoff returns from a two-year spell in France to rejoin the only union he ever represented in South Africa, while Kolisi and De Allende have both signed two-year contract extensions.
The trio joins the likes of hooker Bongi Mbonambi, prop Frans Malherbe and locks Eben Etzebeth and Pieter-Steph du Toit in committing to WP Rugby until 2019.
Director of rugby Gert Smal said that these signings are vital for the long-term vision at Newlands.
'We have a strong group of senior players that will take us forward in the next few years and provide crucial guidance for the young talent we have coming through the ranks all the time.'
Photo: Shaun Roy/Gallo Images