Pregnant Jamie-Lynn Sigler covers her growing bump in glamorous

By -

She's due to give birth to her first son in August.

And pregnant Jamie-Lynn Sigler is so ecstatic about her new addition she decided to sing a song - her first public performance in over a decade.

The expecting actress, who turns 32 next month, covered her growing bump in a glamorous, floor-length sequin gown for the 'What A Pair!' benefit concert Saturday.

Glowing and showing: Pregnant Jamie-Lynn Sigler covered her growing bump in a glamorous, floor-length sequin gown for the 'What A Pair!' benefit concert Saturday
Glowing and showing: Pregnant Jamie-Lynn Sigler covered her growing bump in a glamorous, floor-length sequin gown for the 'What A Pair!' benefit concert Saturday
The event, held at The Broad Stage in Santa Monica, is a Broadway-caliber production pairing celebrities of film, TV, and stage for duets.

The Sopranos star was assigned to sing with actress Katie Lowes, who stars on ABC's Scandal.
'Me and @jamielsigler getting read to sing... Long Island represent!' tweeted Lowes along with a backstage snap.
Other stars warming their pipes for cancer were Laura Bell Bundy, Taylor Dayne, Loretta Devine, Leah Thompson, and her daughter Maddie.


Elegant: The expecting actress, who turns 32 next month, cradled her bump outside The Broad Stage in Santa Monica
Elegant: The expecting actress, who turns 32 next month, cradled her bump outside The Broad Stage in Santa Monica
Elegant: The expecting actress, who turns 32 next month, cradled her bump outside The Broad Stage in Santa Monica


Congratulations! Jamie-Lynn is due to give birth to her first son in August with fiancé Washington Nationals infielder Cutter Dykstra
Congratulations! Jamie-Lynn is due to give birth to her first son in August with fiancé Washington Nationals infielder Cutter Dykstra
Crooning for cancer: She's so ecstatic about her new addition she decided to sing a song - her first public performance in over a decade
Crooning for cancer: She's so ecstatic about her new addition she decided to sing a song - her first public performance in over a decade
The official website proudly stated that 'one hundred percent of net proceeds benefit' Cedars-Sinai’s breast cancer research and education programs at the Samuel Oschin Comprehensive Cancer Institute.

Back in 2001, Sigler released a pop album called Here to Heaven, which was a commercial failure.
In a 2007 interview with Vegas magazine, Sigler said she was 'embarrassed' by the album and regretted releasing it.
Not seen Saturday was Jamie-Lynn's fiancé Washington Nationals infielder Cutter Dykstra.



Long Island gals: The What A Pair concert paired celebrities for duets and they assigned Sigler to sing with actress Katie Lowes, who stars on ABC's Scandal

Her big regret: Back in 2001, Sigler released a pop album called Here to Heaven, which was a commercial failure
Her big regret: Back in 2001, Sigler released a pop album called Here to Heaven, which was a commercial failure

The 23-year-old baseballer, whose father is former Mets star Lenny Dykstra, proposed in January shortly after the couple discovered they were pregnant.
An insider told ‘Jamie couldn't be happier. Cutter is the perfect guy for her. Although they have only been together for a year, they both know that this is it for both of them.’

The brunette beauty admitted that she was thrown for a bit of a 'loop' by the whole process.
Jamie-Lynn told 'We definitely thought it was going to be a slow relationship process and possibly an engagement — I felt like it was coming — so the baby definitely threw us for a loop.'

Parents-to-be: The 23-year-old baseballer, whose father is former Mets star Lenny Dykstra, proposed in January shortly after the couple discovered they were pregnant
Parents-to-be: The 23-year-old baseballer, whose father is former Mets star Lenny Dykstra, proposed in January shortly after the couple discovered they were pregnant
It won't be the first marriage for the Guys with Kids actress.

She divorced her agent-turned-husband A. J. DiScala in 2005.

And in the past, Sigler romanced Entourage Jerry Ferrara, NY Jets quarterback Mark Sanchez, and restauranteur Scott Sartiano.

Jamie-Lynn will next be seen in the drama Anatomy of the Tide due out June 6.