Caitlyn Jenner's reality series premieres with 2.7 M viewers

With ratings not as high as expected, Caitlyn Jenner's reality series ' premiered on Sunday night on E!.

According to Nielsen, Caitlyn Jenner's  'I Am Cait' averaged a 1.2 rating in adults 18-49 and 2.73 million viewers overall for its debut.

Among those 2.73 million viewers, more than half (1.5 million) were adults 18-49. Over all, its four plays has  had a total audience of 6.2 million for E!

in April, set a very high ratings, delivering the strongest showing of "20/20" in 15 years and bringing in 17 million viewers.

The special episode of undefinedbrought in 4.2 million viewers.