Reminding us once again that the pair are now firm pals, Witherspoon informed fans via Instagram that the songstress sent her a mysterious orange box.
In the hilarious clip, the actress is seen rolling the giant package through her garden alongside her mum, as they try to guess what could be inside.
The mother-of-three then clambers into the box with one of the singer's songs providing an epic backtrack.
It turns out, the so-large-it-wouldn't-squeze-through-the-letterbox package was stuffed full of clothing from the singer's new Ivy Park x Adidas line.
Further cementing her icon status, Witherspoon wastes no time in modelling the collection, as she dances in a number of looks from a full tracksuit and trainers to a supersized hoodie.
"Does this officially make me the newest member of the #Beyhive?!" the 43-year-old captioned the post. "Thank you, @Beyonce for the #IvyPark swag!"
Though it's not the first present she has received from the Carters, as the Big Little Lies star recently revealed that she had been sent a case of Armand de Brignac - bubbles now owned by Jay-Z's label.