Topshop partnered with Beyoncé to launch Ivy Park in 2016.
Ivy Park was introduced as an activewear brand created through a joint venture between Beyoncé and Sir Philip Green, whose Arcadia Group owned Topshop at the time. The first collection launched in April 2016 and included performance clothing designed for exercise and everyday wear.
The brand name referred to Beyoncé’s daughter, Blue Ivy, and Parkwood Park in Houston, where Beyoncé said she had spent time running. The partnership with Topshop later ended, and Beyoncé acquired full ownership of Ivy Park in 2018.
Ivy Park subsequently entered a partnership with Adidas, announced in 2018, with the first Adidas collection arriving in 2020. Because Topshop and Adidas were both connected to the brand at different stages, the launch partner is the important distinction in this question.