She only gave birth a week ago, but Ivanka Trump looked incredible as she dressed up for her newborn son's bris on Sunday.

The 34-year-old's third child with husband Jared Kushner - named Theodore James Kushner - was born on March 27. They also have Arabella Rose, four, and a boy named Joseph Frederick, two, together.

And in keeping with the couple's Jewish beliefs, baby Theodore is to be circumcised in a ceremony, also known as a brit milah, on the eighth day of his life.

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Ivanka Trump (pictured) looked incredible as she dressed up for her newborn son's bris on Sunday

The 34-year-old co-ordinated outfits with her daughter Arabella (pictured together) for the occasion

Donald Trump's eldest daughter converted to Judaism before marrying Kushner in 2009 - and has said her family are 'pretty observant'.

The couple had their firstborn son circumcised in 2013 and on Sunday, the family all dressed up to attend a ceremony for the latest addition to their family in New York.

Despite the chilly weather on Sunday, Ivanka looked radiant and spring ready as she donned a figure-hugging white and pale pink dress for the occasion teamed with a matching pink handbag.

Arabella was dressed to co-ordinate with her mother, with a white patterned dressed visible under a pale pink coat.

Jared Kushner (pictured) was pictured carrying a car seat carrying baby Theodore covered with a blanket

Kushner, Trump and their daughter are pictured getting into a car to head to the ceremony

A sharply dressed Kushner, 35, walked out of the family's apartment, located in the Trump Park Avenue compex on Manhattan's Upper East Side, with a car seat carrying baby Theodore. The newborn remained out of sight under a white blanket.

Later, little Joseph stepped out holding his father's hand, dressed in a white shirt and black suit.

Also pictured heading to the ceremony, performed at an undisclosed location in Midtown Manhattan, was Ivanka's mother and The Donald's first wife, Ivana Trump.

The 67-year-old was spotted in a furry blue coat with a scarf wrapped tight around her head.

Tiny Theodore is seen in a car seat held by his father Jared Kushner after the baby's circumcision

Ivanka (pictured with her daughter Arabella and son Joseph) looked radiant as she stepped out on Sunday

Trump holds hands with her two-year-old son Joseph, who also had a bris eight days after his birth

A doorman helps little Arabella with her shoes as they head to the bris in New York on Sunday

Jared Kushner holds a car seat with Theodore inside, who was circumcised on the eighth day of his life

However, it's unclear if her ex-husband attended his grandson's circumcision as he spent Saturday campaigning in Wisconsin ahead of the state's primary on Tuesday.

He is also scheduled to appear at an event in West Allis, Wisconsin, on Sunday evening. Daily Mail Online has contacted the Trump campaign for comment.

However, he has touted his daughter's beliefs to attract Jewish voters in the past.

While speaking at AIPAC in late March, he said: 'My daughter Ivanka is about to have a beautiful Jewish baby.'

'In fact, it could be happening right now, which would be very nice as far as I’m concerned.'

WHAT IS A BRIS? THE JEWISH 'COVENANT OF CIRCUMCISION' Of all of the commandments in Judaism, the brit milah (which translates to 'covenant of circumcision') is probably the most universally observed. Most commonly referred to as a bris, it involves more than just the process of physically removing the baby's foreskin. The commandment to circumcise males is given in Genesis and Leviticus in the Old Testament, a covenant originally made by Abraham. Like many Jewish commandments, the brit milah is commonly seen as a hygienic measure, however scripture states the reason for circumcision is an outward physical sign of the eternal covenant between G-d and the Jewish people. The circumcision must be performed during the day on the eighth day of the child's life - with the day the child is born counting as the first day. The process is performed by a mohel - a pious, observant Jew educated in the relevant Jewish law and in surgical techniques. While the circumcision is performed, the child is held by a person called a sandek (often translated to 'godfather' in English. It is considered an honor to act as the sandek for a bris and the role is often done by a grandparent or family rabbi. Blessings are recited for the baby, including one over wine. A drop of wine is then placed in the child's mouth before he is given a formal Hebrew name. The ceremony is often followed by a celebratory meal. Advertisement

Donald Trump's first wife Ivana (pictured) was spotted arriving for the ceremony on Sunday

The 67-year-old braced herself against Sunday's chilly weather by donning a blue furry coat and scarf

It is unclear if Donald Trump will be attending his grandson's bris. Pictured, the GOP frontrunner speaks in Rothschild, Wisconsin, on Saturday

Trump may be giving his grandson's circumcision a miss after one of the worst weeks of his campaign - much of it spent much on defense over comments about abortion, NATO and nuclear weapons for Japan and South Korea.

As polls for the Wisconsin Republican primary show the ultraconservative Cruz is holding a 10-point lead, the billionaire has launched a series of events in the heartland state to rally support.

As well as a reputation for sexism, his latest controversies, including comments on Heidi Cruz, abortion and a reporter who says she was roughed up by Trump's campaign manager, have alienated women voters further.

Jared Kushner, Ivanka Trump and their son and daughter arrive for Theodore's bris

Ivanka holds her son Joseph's hand while Arabella walks behind after the traditional ceremony

Donald Trump Jr's wife Vanessa is pictured leaving the bris in New York City on Sunday afternoom

Ivanka will also be returning to campaign for her father in another week or so, the billionaire said recently

His remark that women who undergo abortions should be 'punished' - one that his campaign quickly backtracked on - united both abortion rights activists and opponents in their criticism.

It also raised concerns in the Republican Party that Trump's unpopularity with women as measured in preference polling would make him unelectable in a general election match-up against Democrat Hillary Clinton.

In an apparent effort to address the concern, Trump said his wife Melania will be campaigning with him Monday. He added that Ivanka will also be returning to campaign with him in another week or so.

A helper carried a Moses basket and a Bergdorf Goodman bag of gifts for Ivanka Trump's new baby

A man holds a Moses basket as other wait to load presents into a car after the ceremony