AT&T is paying $85.4 billion (£70 billion) for Time Warner, the company which owns the cable TV channels CNN and HBO.
However, the deal has raised questions about competition, and will be subject to a hearing next month.
If approved, it would be the biggest merger to be announced this year. It would combine AT&T's distribution network of 130 million mobile phone customers and 25 million pay-TV subscribers, with content from the Warner Bros film studios and cable TV channels HBO, CNN and the Cartoon Network.
HBO is home to critically acclaimed ratings-winners like 'Game of Thrones', 'Veep' and 'Silicon Valley'.
The deal could see AT&T customers being offered incentives to watch HBO shows. For example, it could arrange so streaming 'Game of Thrones' to your phone doesn't eat into your monthly data allowance.
However, it's exactly this kind of proposition that has competition regulators stroking their chins in contemplation. We'll have to wait and see if it goes ahead.