Myleene Klass joins hunky beau Simon Motson at Save the Children's Centenary ...

She announced she's expecting her third child in a sweet Valentine's Day post earlier this year.

And Myleene Klass looked every inch the yummy mummy as she joined her boyfriend Simon Motson at the Save the Children's Centenary Gala, held at Camden's Roundhouse venue in London on Thursday evening.

The former Hear'Say singer, 41, cut a typically glamorous figure as she was dressed in a striking scarlet gown, complete with a wrap-front detail and a belted feature.

Oh, baby! Pregnant Myleene Klass looked every inch the yummy mummy as she joined her boyfriend Simon Motson at the Save the Children's Centenary Gala, held at Camden's Roundhouse venue in London on Thursday

Oh, baby! Pregnant Myleene Klass looked every inch the yummy mummy as she joined her boyfriend Simon Motson at the Save the Children's Centenary Gala, held at Camden's Roundhouse venue in London on Thursday

Enhancing her height, the musician added a pair of sky-high heels to her feet for the glitzy outing.

The mother-of-two ensured focus remained on her stunning outfit as she kept accessories to a minimum, sporting a dainty sapphire necklace while toting a simple black clutch. 

TV personality Myleene framed her radiant visage with loose curls, and complemented her pregnancy glow with heavy strokes of dewy foundation.

Looking good: The former Hear'Say singer, 41, cut a typically glamorous figure as she was dressed in a striking scarlet gown, complete with a wrap-front detail and a belted feature

Looking good: The former Hear'Say singer, 41, cut a typically glamorous figure as she was dressed in a striking scarlet gown, complete with a wrap-front detail and a belted feature

Standing tall: Enhancing her height, the musician added a pair of sky-high heels to her feet for the glitzy outing

Standing tall: Enhancing her height, the musician added a pair of sky-high heels to her feet for the glitzy outing

All about the details: The mother-of-two ensured focus remained on her stunning outfit as she kept accessories to a minimum, sporting a dainty sapphire necklace while toting a simple black clutch

All about the details: The mother-of-two ensured focus remained on her stunning outfit as she kept accessories to a minimum, sporting a dainty sapphire necklace while toting a simple black clutch

Radiant: TV personality Myleene framed her radiant visage with loose curls, and complemented her pregnancy glow with heavy strokes of dewy foundation

Radiant: TV personality Myleene framed her radiant visage with loose curls, and complemented her pregnancy glow with heavy strokes of dewy foundation

Suave: Fashion executive Simon put on a dapper display as he rocked a velvet tuxedo blazer, tied in with a bow tie, a white shirt and straight-leg trousers

Suave: Fashion executive Simon put on a dapper display as he rocked a velvet tuxedo blazer, tied in with a bow tie, a white shirt and straight-leg trousers

Fashion executive Simon put on a dapper display as he rocked a velvet tuxedo blazer, tied in with a bow tie, a white shirt and straight-leg trousers.

The event featured a star-studded line-up, including Claudia Winkleman, Poppy Delevigne, and the gala's co-chair Helena Bonham Carter. 

Doting mother Myleene has been an ambassador for the non-profit organization since 2012. 

Standing out: The gala's co-chair Helena Bonham Carter displayed her signature sense of style as she slipped into a black satin gown, teamed with a velvet red cropped cardigan

Standing out: The gala's co-chair Helena Bonham Carter displayed her signature sense of style as she slipped into a black satin gown, teamed with a velvet red cropped cardigan

Standing out: The gala's co-chair Helena Bonham Carter displayed her signature sense of style as she slipped into a black satin gown, teamed with a velvet red cropped cardigan

Bold: Adhering to the red theme, the Les Misérables actress, 52, posed with her heavily-beaded handbag

Bold: Adhering to the red theme, the Les Misérables actress, 52, posed with her heavily-beaded

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