The Teen Mom OG star, 27, tweeted her thanks to her followers on Friday night for their supportive responses to news of her pregnancy.
“Thank you everyone for all the kind words. I’m very excited for my future with Andrew and our little family we are starting together! Love,” she tweeted.
Tyler tweeted, “CONGRATS AMB! We are so happy for you & can’t wait to meet that little baby!” Catelynn tweeted, “Congratulations babe. I love you and can’t wait to see you at Friendsgiving.”
Portwood responded with, “Thank you hun! Love you guys always.”
Briana De Jesus, and her sister, Brittany, who star on Teen Mom 2, tweeted to Portwood to wish her well, writing, “Congrats, hope it’s a boy! Lol,” and “Congratulations.”
A source confirmed to PEOPLE recently that the reality star was telling family she was pregnant with baby no 2.
The reality star is already mother to 8-year-old daughter Leah, with ex Gary Shirley.
Portwood and Baier broke up while filming Marriage Boot Camp earlier this summer following three years together. In May, a source told PEOPLE that their fall wedding was off.
They hit a rough patch last August when reports surfaced that Baier was facing legal trouble for failing to paying child support to multiple other women for several secret biological children.