Saudi Arabia's King Salman Bin Abdel-Aziz arrives in Egypt Thursday in his first official state visit to Cairo since ascending to the Saudi throne in January 2015.
The trip is expected to last for five days.
Salman was greeted by the Egyptian President Abdel-Fattah El-Sisi upon arrival Thursday.
During Salman's visit, Egypt will sign four funding accords with Saudi Arabia worth roughly $22 billion, to come into effect Friday, according to official sources.
El-Sisi and the Saudi king are expected to meet on Friday in a plenary session to discuss regional and international issues as well as bilateral relations.
A press conference by both presidents is expected following the session.
The Saudi king is also expected to visit Egypt's parliament on Sunday.
Deputy head of the parliament Soliman Wahdan added that Salman may give a speech during his what he described as a "historic visit" to parliament.
Salman previously visited Egypt's southern Sinai city of Sharm El-Sheikh in March 2015 for the Arab League summit.
The Egyptian presidency described Salman's visit to Cairo as "crowning the close brotherly ties between the two countries."
Saudi Foreign Minister Adel Bin Ahmed Al-Jubeir described the visit as "historic."
Saudi Arabia has supported Cairo with billions of dollars in aid, grants, oil products and cash deposits to help buoy the country's economy following the ouster of Islamist president Mohamed Morsi in July 2013.