Pregnant Vanessa Lachey reveals her third child is a boy in cute Instagram video

LOS ANGELES, Nov. 26 (UPI) -- Pregnant television-personality Vanessa Lachey has announced via Instagram that her third child with her husband, singer Nick Lachey, is a boy.

"I have so much to be Thankful for this year... especially our littlest Lachey," Vanessa wrote in her post. "When Daddy came home from tour this Summer and we were moving into our new house I shared the news!Now I'm sharing it with you! I am so very Thankful and Grateful for this family of mine! And Thankful for YOU! All your Love & support makes what we do FUN and worth it! Happy Thanksgiving Everyone!"

The message accompanied a short video of Nick dragging a wheelie bag up the driveway to the doorway of the family mansion where he is greeted by 4-year-old Camden, who is holding a huge, blue balloon.

Nick hugs his son, holds his 1-year-old daughter Brooklyn and kisses Vanessa as the camera reveals an enormous balloon arch declaring, "It's a boy!"

The couple have been married since 2011.