Princess Kate shows off her pregnant belly in stunning black lace dress at charity gala

PHOTO: Kate Middleton arrives at the 2017 Gala Dinner for The Anna Freud National Centre for Children and Families (AFNCCF) at Kensington Palace in London, Nov. 7, 2017.PlayFrank Augstein - WPA Pool/Getty Images
WATCH Princess Kate opens up about being a mom

Princess Kate hosted a charity gala Tuesday at Kensington Palace to benefit a mental health charity for which she serves as royal patron.

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Kate, 35, who is expecting her third child in April, showed her baby bump in a stunning floor-length, black lace gown by designer Diane von Furstenberg.

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Prince Harry's girlfriend, Meghan Markle, has been seen in a shorter version of the dress Kate wore Wednesday evening.

PHOTO: Britains Kate, the Duchess of Cambridge, at the 2017 Gala Dinner for The Anna Freud National Centre for Children and Families, in London, Nov. 7, 2017 | Meghan Markle at the Characters Unite/Moth Storytelling Event in Los Angeles, Feb. 15, 2012.AP | Getty Images
Britain's Kate, the Duchess of Cambridge, at the 2017 Gala Dinner for The Anna Freud National Centre for Children and Families, in London, Nov. 7, 2017 | Meghan Markle at the "Characters Unite/Moth Storytelling Event" in Los Angeles, Feb. 15, 2012.

Kate, who is known for recycling some of her most elegant outfits, last wore the gown when she was expecting her 2-year-old daughter, Princess Charlotte, in 2014.

PHOTO: Catherine, Duchess of Cambridge, attends The Royal Variety Performance at the London Palladium, Nov. 13, 2014 in London.Samir Hussein/Getty Images
Catherine, Duchess of Cambridge, attends The Royal Variety Performance at the London Palladium, Nov. 13, 2014 in London.

Kate, also the mother of Prince George, 4, has made limited appearances since announcing her third pregnancy in September.

PHOTO: Kate Middleton speaks to various guests at the 2017 Gala Dinner for The Anna Freud National Centre for Children and Families (AFNCCF) at Kensington Palace in London, Nov. 7, 2017.Frank Augstein - WPA Pool/Getty Images
Kate Middleton speaks to various guests at the 2017 Gala Dinner for The Anna Freud National Centre for Children and Families (AFNCCF) at Kensington Palace in London, Nov. 7, 2017.

PHOTO: Kate Middleton attends the 2017 Gala Dinner for The Anna Freud National Centre for Children and Families (AFNCCF), in The Orangery at Kensington Palace in London, Nov. 7, 2017.Frank Augstein - WPA Pool/Getty Images
Kate Middleton attends the 2017 Gala Dinner for The Anna Freud National Centre for Children and Families (AFNCCF), in The Orangery at Kensington Palace in London, Nov. 7, 2017.

Kensington Palace announced at the time that Kate was suffering from hyperemesis gravidarum, or severe morning sickness.

Kate has tried to stick to her schedule of engagements as her health allows, particularly for events that benefit young children and raise awareness for mental health.

She hosted an event today for Place2Be, a charity for which Kate also serves as royal patron. Place2Be provides in-house counselors and professionals to support adolescents suffering from mental health challenges, stress and anxiety.

"As a mother just getting used to leaving my own child at the school gates, it is clear to me that it takes a whole community to help raise a child," Kate said at today's forum. "Whether we are school leaders, teachers, support staff or parents, we're all in this together."

She added, "We are all working to give children the emotional strength they need to face their futures and thrive."

Tuesday's gala benefited the Anna Freud National Centre for Children and Families, an organization dedicated to mental health accessibility and treatment for young children in need. Kate has been a champion of better resources for maternal mental health and programs that support early intervention for vulnerable children and families.

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