Pregnant Kylie Jenner seen in public for the first time since September: See her bump

The world is getting its first glimpse at Kylie Jenner's baby bump.

In a grainy video posted on TMZ on Thursday morning, the pregnant former "Life of Kylie" star is seen fully out in public for the first time since September.

SEE ALSO: Kylie Jenner poses in underwear for Calvin Klein ad with Kim, Kourtney, Khloe and Kendall

The footage, reportedly taken in Hidden Hills on Wednesday, shows Kylie arriving at a construction site in a Range Rover with mother Kris Jenner and best friend Jordyn Woods, as well as one other woman and two other men. 

Wearing all black, the 20-year-old -- who has yet to confirm her reported pregnancy -- sports a clear baby bump as she is seen exiting the car. An accompanying photo shows Kylie walking with pal Jordyn from the front, though her bump isn't nearly as noticeable.

See the TMZ footage in the video below:

Since news that Kylie is expecting her first child with boyfriend Travis Scott back in September, the Kylie Cosmetics founder has been keeping an extremely low profile and has only posted photos of herself on social media from her cleavage up.

SEE ALSO: Kylie Jenner is 'excited' for motherhood, but does 'have moments of being nervous' 

On Monday, the youngest of the original Kardashian-Jenner clan was featured in a newly-launched Calvin Klein ad campaign alongside her famous sisters Kourtney, Kim, Khloe and Kendall. Though the rest of her family posed in Calvin Klein underwear and bras, Kylie wrapped herself in a blanket and wore long-sleeved shirts in the photos.

Both Kourtney and Kim have three children each -- with Kim welcoming third child, daughter Chicago, just last week via surrogate -- and "have tried to give as much advice as possible" to Kylie before she becomes a mother, People reported on Thursday.

See photos from Kylie Jenner's pregnancy:

13 PHOTOS
Kylie Jenner hiding her baby bump on Instagram
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Kylie Jenner hiding her baby bump on Instagram
OUR FAMILY. #MYCALVINS. Close like no other. @kimkardashian, @kyliejenner, @kendalljenner, @khloekardashian and @kourtneykardash shot by @willyvanderperre. Discover more at calvinklein.com/mycalvins. ⠀⠀⠀ ⠀⠀⠀ Show us your family and follow #MYCALVINS to see more from around the world.
OUR FAMILY. #MYCALVINS. @kimkardashian, @kyliejenner, @kendalljenner, @khloekardashian and @kourtneykardash stick together, no matter what. Shot by @willyvanderperre. See more at calvinklein.com/mycalvins. ⠀⠀⠀ ⠀⠀⠀ We’ve shown you our family, now show us yours using #MYCALVINS.
Love my @DanielWellington watch and cuff, perfect gifts for Xmas!🎁🎅🏼#ad Use code KYLIE for an additional 15% off all holiday bundles on Danielwellington.com
Red Velvet Holiday Lip Kit is officially available on KylieCosmetics.com 💋
so... the Holiday Collection launches today 🤩
Happy Monday 🙎🏻‍♀️
morning 💞
♥️🌬 Fire & Ice
new color by @kyliecosmetics "GOALS" launching this Halloween ❣️
oh happy day 💞 wearing a new color by @kyliecosmetics "Boy Bye" launching this Halloween along with 10 other shades xo
Friday the 13th 🖤
Sasha's Shirt 💙
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"The family is still worried because Kylie is so young, but they will all support and help her once the baby arrives," a source told People

Another insider expressed that she might not really know what she has coming.

"Kylie is very naive," the source told People. "Spending time with other people's kids is obviously completely different than being a mom 24/7. Kylie of course has no idea about all the hard work and sleepless nights."

Khloe is also expecting her first child with boyfriend Tristan Thompson, though she has confirmed the news: She took to Instagram back in December to make the announcement months after the initial pregnancy reports broke and has since appeared in a variety of talk shows to discuss her road to parenthood.

See photos from Khloe Kardashian's pregnancy:

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Khloe Kardashian's pregnancy
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Khloe Kardashian's pregnancy
Mommy and Daddy 📸 @sashasamsonova
Hey there Good Mama!
📸 @sashasamsonova
In my @goodamerican denim “The Home Stretch” 🦋 Good Mama 🦋
I’m so proud and excited to be launching maternity with @goodamerican #GoodMama! For all us new mommies dealing with our new changing bodies and for all you beautiful mamas to be! Dropping in Sizes 00-24 💕
All you new mommies and mamas-to-be are going to be so chic in your Good Mamas!! @goodamerican Just dropped in sizes 00-24 on goodamerican.com!!
I’m so excited for the launch of Good Mama!!! Who says pregnancy style can’t be sexy!? I am so proud of my @goodamerican maternity denim #GoodMama!! All you new mommies and mamas-to-be are going to be so chic in your Good Mamas!! Just dropped in sizes 00-24 on goodamerican.com!!
I had no idea where to get started when planning my baby registry! True story!! #ad Breast pumps, bottle sterilizers, and strollers?! OH MY!! I had to call in @KourtneyKardash for her expertise- luckily, @Amazon has everything in one place and made the process so much easier. Check out my registry at the link in my bio! #AmazonBabyRegistry #AllOnAmazon
@goodamerican #GoodMama 💞👖Launches Thursday 3.15.2018
💗
Had the most unbelievable baby shower - we felt so much love! #ad So grateful to be surrounded by a beautiful support system. And special thank you to @Amazon for helping me bring it all together! More pictures to come! 💗 #AllOnAmazon #AmazonBabyRegistry
OGs
💗 Kyoto Khlo 💗 8 Month Bump 💗
💙 有難い 💙
💌 What’s meant to be will always find its way 💌
With great love... 💌
Baby mama KoKo! 29 Weeks and counting ❤️ Glam: @styledbyhrush Hair: @andrewfitzsimons Hair Color: @traceycunningham1
Shooting for Good American today with my Good Squad @styledbyhrush @andrewfitzsimons #GoodMama
💙Press day💙Tune into Jimmy Kimmel tonight!!!! Season two of revenge body premieres THIS Sunday on E!!! Hrush and Andrew are really serving!! The leeeewks! 💙
Congratulations My Sweet Kylie! What a magical ride it's been! I'll miss you bumping along with me. Never in a million years did I think we would do this together but it's been that much more special because of it. God is so great!! He had His plan all along! I love you little mama 💕 love big mama
My Ellen Show look! Press for Revenge Body!! Season 2 airs THIS SUNDAY!!! @styledbyhrush made me a bronze golden goddess. While @andrewfitzsimons went full on!! Bigger the hair- smaller the bump! Lol it's all about proportions! Glam killed it!!!
❥ Mom and Dad ❥
❥ Officially 6 months ❥
✨Merry Christmas!! May you sparkle and shine this festive season, may all of your wishes and dreams come true. I pray that we all may feel this happiness all year round. God bless you! ✨ #BabyBump🤗
My greatest dream realized! We are having a baby! I had been waiting and wondering but God had a plan all along. He knew what He was doing. I simply had to trust in Him and be patient. I still at times can't believe that our love created life! Tristan, thank you for loving me the way that you do! Thank you for treating me like a Queen! Thank you for making me feel beautiful at all stages! Tristan, most of all, Thank you for making me a MOMMY!!! You have made this experience even more magical than I could have envisioned! I will never forget how wonderful you've been to me during this time! Thank you for making me so happy my love! Thank you to everyone for the love and positive vibes! I know we've been keeping this quiet but we wanted to enjoy this between our family and close friends as long as we could privately. To enjoy our first precious moments just us ❤️ Thank you all for understanding. I am so thankful, excited, nervous, eager, overjoyed and scared all in one! But it's the best bundle of feelings I've ever felt in my life! ❤️❤️❤️
LOS ANGELES, CA - DECEMBER 08: Khloe Kardashian is seen on December 8, 2017 in Los Angeles, CA. (Photo by SMXRF/Star Max/GC Images)
LOS ANGELES, CA - JANUARY 03: Khloe Kardashian is seen on January 3, 2018 in Los Angeles, CA. (Photo by SMXRF/Star Max/GC Images)
LOS ANGELES, CA - JANUARY 04: Khloe Kardashian is seen on January 04, 2018 in Los Angeles, California. (Photo by PG/Bauer-Griffin/GC Images)
LOS ANGELES, CA - JANUARY 04: Khloe Kardashian is seen at 'Jimmy Kimmel Live' on January 04, 2018 in Los Angeles, California. (Photo by BG017/Bauer-Griffin/GC Images)
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