Dancing With The Stars pro Lindsay Arnold posed in a bikini just two months after welcoming her first child. The 26-year-old and her husband Samuel Lightner Cusick are on a vacation with their daughter Sage Jill who was born on November 2. Fans of the professional dancer cannot believe how amazing she looks post-pregnancy. https:\/\/www.instagram.com\/p\/CJrpdA2HHjN\/ 'Dancing With The Stars' Pro Lindsay Arnold Showed Off Post-Baby Body Lindsay wore a simple black bikini in Instagram pictures that were taken by her husband. "Vacation time. Instagram husband\/dad of the year goes to Sam who is mine and Sage's personal photographer for this trip" she captioned the post. She stood with her toes dipped in the ocean and flashed a smile for the camera with her post-baby body on full display. Fans were completely in disbelief in the comments section that Lindsay just recently gave birth. "And you just had a baby???? Gah your so gorgeous" one fan commented. "No waaaayyyy you just had a baby! Girl, you look amazing" another gushed. She also wore a yellow bikini on her instagram story as she and Sage sat poolside. SEE ALSO: 'DANCING WITH THE STARS' PRO WITNEY CARSON GIVES BIRTH TO FIRST CHILD "You just had a baby. You have abs. Looking good mama bear!" said another fan. "Can we talk about how AMAZING you look after just having a baby!!??" another asked. Lindsay also showed some love for Sam in another post from their beach vacation. She called him her "best friend" and said that friendship is "the key to a happy and successful marriage." The pair were high school sweethearts who got engaged in 2014. They were married in 2015. Lindsay began her Dancing With The Stars pro career on season 16 in 2013. https:\/\/www.instagram.com\/p\/CJtcOgNn-cY\/ The Name Of Their Daughter Has A Special Meaning Sage was born eight days early after she was breech. Lindsay underwent a C-section delivery. It was a very special day for Lindsay and Sam that already held onto a lot of memories. "She entered this world on the same day that we lost Sam's beautiful mother just one year ago and we couldn't help but see God's hand in this and know that Sage was handed down to us by her beautiful angel grandmother, Jennifer Jill Gillette Cusick," Lindsay wrote on Instagram. Sage's middle name, Jill, is in honor of Sam's mother. https:\/\/www.instagram.com\/p\/CHLvXYdHkDS\/ Lindsay Arnold And Her Bestie Witney Carson Were Pregnant Together Lindsay's Dancing With The Stars bestie Witney Carson also just gave birth to a baby boy on January 4. Witney served as the maid of honor at Lindsay's wedding. She documented her labor in a quick Instagram video. "I just can't believe it. Witney and I are sitting here both pregnant, chatting with Entertainment Tonight!" Lindsay said when the pair were pregnant together. "It's actually insane. We've done so many things in our lives together, so it's like, naturally, why wouldn't we get pregnant together? It's so funny because you can't really plan a pregnancy. I mean, you can plan when you want to try, but it's not like it's always going to happen when you want it to." https:\/\/www.instagram.com\/p\/CJsLhKlBdFv\/ SEE ALSO: PREGNANT ASHLEY TISDALE FLASHES BABY BUMP ON 'THE MASKED DANCER' \u2014 ALL ABOUT HER PREGNANCY There is no shortage of adorable pictures of baby Sage on Lindsay's Instagram account. Judging based on Witney and Lindsay's close relationship, we have a feeling their kids will grow up to be besties too.