Hilaria Baldwin strips down to her underwear for a workout after giving birth to Romeo six weeks ago

She gave birth to her fourth child, Romeo, just six weeks ago. 

And working hard to get back to her pre-baby body, Hilaria Baldwin showcased her quick and easy bathroom workout for her fans on Thursday while in her underwear. 

Taking to Instagram, the 34-year-old confessed she was incredibly tired following her lack of sleep and run beforehand, but was still 'showing up'.

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Back at it! Hilaria Baldwin stripped down to her underwear for a workout on Thursday - following the arrival of her fourth child, son, Romeo six weeks ago

Back at it! Hilaria Baldwin stripped down to her underwear for a workout on Thursday - following the arrival of her fourth child, son, Romeo six weeks ago

'Romeo is 6 weeks today! I just came back from a run and am red in the face, tired, and my hair is (sic),' she captioned. 

'Dying to get in the shower before my kids come home from a play date. Quick bathroom workouts have become some of my favs.' 

Hilaria progressed to explain her workout using 5lbs weights. 

Doing what she can: 'Dying to get in the shower before my kids come home from a play date. Quick bathroom workouts have become some of my favs

Doing what she can: 'Dying to get in the shower before my kids come home from a play date. Quick bathroom workouts have become some of my favs

'Quick bathroom workouts have become some of my favs': Hilaria progressed to explain her workout using 5lbs weights

'Quick bathroom workouts have become some of my favs': Hilaria progressed to explain her workout using 5lbs weights

Bounced back fast! Hilaria welcomed her fourth child, son, Romeo six weeks ago and has already been showcasing her incredible post baby body 

Bounced back fast! Hilaria welcomed her fourth child, son, Romeo six weeks ago and has already been showcasing her incredible post baby body 

Holding a squat throughout, she began with full bicep curls and followed them with lower range curls and upper range curls.  

'Keep your elbows by your sides. You can see that mine are swinging a bit (not good), but we all need to improve, yes? And this mama is tired but showing up!, she continued. 

'(oh yes, and the outfit...think of it as a bikini if you are offended....jumping in the shower now!)'. 

Real mom: Hilaria is no stranger to keeping it real about the ups and downs of motherhood on social media 

Real mom: Hilaria is no stranger to keeping it real about the ups and downs of motherhood on social media 

Hilaria is married to Hollywood actor Alec Baldwin, 60. 

The pair began dating in 2011 and married the following year.

Together, they're parents to daughter Carmen, four, and sons Rafael, two, Leonardo, one, and Romeo, six-weeks. 

Alec is also the father to Ireland, 22, from his marriage to Kim Basinger, 64.  

Big brood: Hilaria and husband Alec Baldwin, 60, are parents to daughter Carmen, four, and sons Rafael, two, Leonardo, one, and Romeo, six-weeks 

Big brood: Hilaria and husband Alec Baldwin, 60, are parents to daughter Carmen, four, and sons Rafael, two, Leonardo, one, and Romeo, six-weeks 

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Hilaria Baldwin strips down to her underwear for a workout after giving birth to Romeo six weeks ago

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