She gets it from her mama.
"Giving THANKS for my wonderful family!" The Morning Show star captioned her post, which also included a pile of polaroid pictures featuring various members from her family. "And for pie 🥧 I love pie! ❤️💫🥧" she added.
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Aside from Witherspoon and her mom, the Cruel Intentions alum also has a mini-me of her own, her 23-year-old daughter Ava, who she shares with ex Ryan Phillippe.
"Did they clone every female in your family??😳🤭 You all look sooooo much alike!!😍😱" one fan commented on Friday's post.
"The Witherspoon genes are strong" another person wrote.
But the post wasn't all mother-daughter fun, as Witherspoon also shared a sweet photo with her brother, John, as well as another snap that showed her cuddling with Tennessee, her 10-year-old son with husband Jim Toth.
Witherspoon's post also featured snaps of extended family members, her Thanksgiving dinner plate, her husband and, of course, her adorable French Bulldog, Minnie.
"love this," country star Kelsea Ballerini commented under the post, while Witherspoon's former co-star Lexi Underwood added, "I hope you and your family had a lovely Thanksgiving. ❤️"
"Beautiful family!!!" chef Candace Nelson also chimed in.