Chrissy Teigen and John Legend are undoubtedly one of the entertainment industry's favorite couples. From show-stopping red carpet looks to frequent family social media posts, it seems like this duo can do no wrong—and companies agree.

While most celebrities have endorsement deals and participate in some social media advertising, Chrissy Teigen and John Legend seem to always catch the best breaks. Working with Google, Stella Artois, McDonald’s, Pampers, Axe, and many more, the famous couple can sell just about anything.

Marketing experts say the reason for this is that Teigen and Legend are the perfect mix of popularity, relatability, and diversity.

“They’re a big celebrity couple who gets major press, they check the representation bucket, and they’re not controversial,” Chuck Welch, the founder and chief strategy officer of a marketing firm called Rupture Studio, told Moneyish. “Add those three things together, and it’s a sound investment.”

Brands continue to book the couple to appear in advertisements because, while they are both famous separately, it is their bond, marriage, and family that makes them the ideal celebrities for endorsement. Their most recent commercial to obsess over is an advertisement for the Google Assistant, which is actually voiced by Legend himself. 

“The two of them are practically perfect in every way,” Robert Thompson, a Syracuse University professor and pop culture expert said. “There’s a sense that they’re telegenic. They don’t depend on being one half of a couple for their fame, but at the same time, being a couple gives them the typical boost that two famous people are more famous than the sum of their parts.”

Even though it's paid work and marketers have designed ways to make the couple look more picturesque, it seems like in the end, the people just love Chrissy Teigen and John Legend.