Gigi Hadid stuns in chic business attire alongside sister Bella as siblings support their father Mohamed as he gives a talk at Harvard By Christopher Friedmann For Dailymail.com Published: 22:58 BST, 7 April 2019 | Updated: 23:09 BST, 7 April 2019 Viewcomments Their father is a well-known real estate developer with projects all over the the world. And Bella and Gigi Hadid were both in Cambridge, Massachusetts on Sunday to support their dad Mohamed Hadid. The 22-year-old and 23-year-old models watched on as the 70-year-old business man spoke at the HAAA Arab Conference at Harvard. Proud: Bella and Gigi Hadid were both in Cambridge, Massachusetts on Sunday to support their dad Mohamed Hadid Bella looked absolutely gorgeous in a blue denim suit with tight pants that highlighted her long legs. Underneath she sported an elegant white turtleneck and added a relaxed touch via white sneakers. She pulled her dirty blonde tresses into a straightforward ponytail, letting it spill across her shoulders. Beauty: Bella looked absolutely gorgeous in a blue denim suit with tight pants that highlighted her long legs Gigi played with the business motif even more than her younger sister, pairing grey slacks with a white button-down shirt. She painted her lips a deep a deep rose and wore stylish black loafers on her feet. Her dirty blonde locks were left unencumbered and tumbled across her shoulders in thick waves. Mohamed spoke about his life as a real estate developer while speaking to attendees of the Arab Conference. Stunning: Gigi played with the business motif even more than her younger sister, pairing grey slacks with a white button-down shirt Despite his immense success, Mohamed is currently entangled in courtroom drama over the 40,000 sg ft Bel Air mansion he is building for himself. The massive project remains unfinished and is currently involved in multiple lawsuits as well as an FBI investigation. Elsewhere, Mohamed is involved in the creation of the world's biggest building, which will be constructed in Maadi, Cairo, Egypt. Skyline is set to occupy a record-breaking 2.1 million-plus square feet and will include entertainment, dining, ice skating, cinemas, as well as housing. Man of the hour: Mohamed spoke about his life as a real estate developer while speaking to attendees of the Arab Conference Share or comment on this article: All rights reserved for this news site dailymail and under his responsibility