I Am Cait pulled in 7.7M total unique viewers in L3s across its four airings on Sunday. Its L3 average from 8-9 PM had a +42% lift in total viewers over LS with 3.9M, a +54% increase in P18-49 with 2.3M, and a +58% boost in W18-49 with 1.7M, according to E!.

The eight-episode, hour-long series ranks as E!’s 2nd biggest launch in the network’s history among total viewers and E!’s core A18-49 audience, and biggest launch in network history among W18-49, E! says. The Anna Nicole Smith Show’s debut in 2002 was the largest audience and 18-49 result in E!’s history.

The Caitlyn Jenner reality series about the former Kardashian step-dad and 1976 Olympian premiered Sunday internationally on local E! channels in 120 countries. The UK will get I Am Cait beginning on August 2.