Subscribers of the streaming platform who don’t have HBO on the platform can now gain a discount for six months, priced at $4.99 (£3.49) per month. After the period, the price will go back up at $14.99 again.
The company began making the limited offer on its website, but never officially announced the move.
Hulu began offering HBO as an add-on to its service last July, which joins further channels such as Showtime and Cinemax.
This week, Hulu also began offering a premium bundle, which sees it offer a subscription for music streamer Spotify and Hulu for $12.99 a month.