Peter Alexander is the crowning fashion jewel at Premier Investments.
The sleepwear brand achieved 13.8% sales growth to $99.4 million in the first half of fiscal 2017.
This helped Premier Investments clock underlying net profit after tax of $100.6 million for the period.
The result is up 9.7% on the same time last year, with net profit at $71.9 million.
Total sales for the retail group were up 7.1% to $588.6 million.
Peter Alexander opened three new stores during the half, with all trading ahead of expectations.
The brand also refurbished and relocated larger stores in Chadstone, Pacific Fair, Spencer STreet and Warringah.
It will open between five and seven stores per year from 2017 to 2019.
Peter Alexander plans to upgrade, refurbish, or upsize between three to five existing stores per year over the same time frame.
Sister brands Dotti, Just Jeans and Jay Jays also recorded sales growth over the period.
Online sales across the group soared 48% on the same period last year, on track to see the group reach $100 million in annual online sales by 2020.