Ethiopian Olympic heroes Haile Gebreselasi and Feiza Lilesa said they are ready to go to the front to fight the rebels.
Their announcement was made after Prime Minister Abiy Ahmed (Abiy Ahmed) stated that he would go to the front to lead the war.
The Tigrayan rebels stated that they are advancing towards the capital Addis Ababa.
As the civil war escalated, Germany and France have become the latest countries to advise their citizens to leave Ethiopia.
On Tuesday, the US special envoy to the region, Jeffrey Feltman, warned that shocking developments on the ground were jeopardizing initial diplomatic progress towards ending the conflict.
The rebels said earlier this week that they had taken control of Shewa Robit, a small town about 225 kilometers (140 miles) northeast of Addis Ababa.
There is no independent confirmation of the claim.
The official media quoted the spokesperson as saying that as Mr. Abbey went to direct the war effort, his deputy Demeke Mekonnen Hasse (Demeke Mekonnen Hasse) was in charge of daily government affairs.
Mr. Abi’s announcement promoted the recruitment of the army, and hundreds of recruits participated in a ceremony marked by patriotic songs in Addis Ababa on Wednesday.
Earlier, national television quoted 48-year-old Gebrselassie as saying that Mr. Abbey’s decision to enter the war was “expected by a leader who loves the motherland”.
He said: “I am ready to do whatever I need to do, including going to the front line.”
Gebrselassie is regarded as a legend in Ethiopia, and his remarks are regarded as an attempt to win public support behind the war effort.
In his 25-year career as an athlete, he won two Olympic gold medals, eight world championships and set 27 world records.
He announced his withdrawal from the competition in 2015.
The 31-year-old Feyisa expressed his support for the war. The website of the state-affiliated Fana Broadcasting Corporation quoted Feyisa as saying that Mr. Abiy had made the “right decision” and that he would go to the front line to face the insurgents.
He added that he is also ready to draw inspiration from the “ancestors’ bravery” and go to the front line to “save my country.”
The athlete won a silver medal in the marathon at the 2016 Rio Olympics.
He is known for raising crossed wrists, as if they were bound, to draw global attention to the suppression of Ethiopian demonstrators demanding political reforms.
The Tigray People’s Liberation Front (TPLF) was the main political party of the government at that time. After the protests ended, Mr. Abi became prime minister and TPLF lost control of the country it had held for 27 years.
It then withdrew its stronghold, Tigray, from where it launched a rebellion last November after a huge dispute with Mr. Abbey over reforms.
The war caused a large-scale humanitarian crisis, causing thousands of deaths, millions of people being forced to leave their homes, and hundreds of thousands of people falling into famine-like situations as aid agencies compete for food in war-affected areas.
The African Union is taking the lead in efforts to end the fighting through negotiations, but neither party has committed to negotiations.
On Tuesday, the German Ministry of Foreign Affairs stated that its nationals should leave on the first available commercial flights, while France urged its citizens to leave the country “without delay.”
At the same time, a UN internal security document stated that “qualified family members of internationally recruited staff” should be evacuated before November 25.
Earlier, the United States and Britain announced the withdrawal of non-essential diplomats and asked other citizens to leave.
TPLF is heading towards Addis Ababa on the A2 highway and is now further south than Kemis.
More information about the Tigray crisis: